Doesn't even need to be a magic rock. A regular one thrown at your head also does wonders.
Shit, even a crack rock can do it.
In fairness, Doomsday beat Superman in a straight knuckle dust up, no kryptonite required. So that's also a Superman weakness.

In Superman The Animated Series Batman (and the Joker) discover that a jade dragon is actually made out of kryptonite because the owners die after a few months.
And in some of the stories Lex Luthor loses his hair because of his kryptonite experiments.
So at least in those universes it's also harmful for humans.
And in some of the stories Lex Luthor loses his hair because of his kryptonite experiments.
In Smallville, the spacecraft carrying Superman brings a kryptonite meteor swarm with it. Lex's exposure to the meteors is the cause of his premature baldness and a partial reason for his resentment of The Alien.
And in some of the stories Lex Luthor loses his hair because of his kryptonite experiments.
In the mainline comics of the ‘80s and ‘90s, wearing a kryptonite ring day after day gave him incurable cancer.
I forget the exact number but a surprising amount of fellas are also confident about winning a fist fight with a bear, so, yeah. This makes sense.
I means it's simple really. As the bear charges, I dodge to the side, aim for the eye and with a quick jab...get mauled and die painfully
"What if I pretend like people are saying something stupid and then cleverly refute it? Yes, that will make an excellent meme."

Ah man I've not heard Kryptonite in years
I have a short playlist of Superman songs.
- Kryptonite - 3 doors down
- Jimmy Olsen’s Blues - Spin Doctors
- Superman (Its not easy) - Five for Fighting
- Superman’s Dead - Our Lady Peace
- (Wish i could fly like) Superman - The Kinks
- Superman - REM
Always looking for more.
What about "(I'm No) Superman" by Lazlo Bane, aka the Scrubs theme song?
Sunshine Superman - Donovan
Superman's Song - Crash Test Dummies
I sing it to my son at bedtime.
Hero 77 - Bombay Street
Mentions batman, superman, spiderman, Mr incredible, but it's not a song about them.
Superman - Love Spit Love
You Don't Mess Around With Jim by Jim Croce isn't directly about him but does give good advice on treating this wardrobe with respect.
Silvergun Superman - stone Temple pilots
If we're talking pure elements at room temperature, people can die from extended contact/eating/breathing beryllium, fluorine, phosphorous, hlorine, chromium, cobalt, arsenic, cadmium, antimony, cesium, mercury, thallium, lead, bismuth, polonium, radium, thorium, uranium, plutonium, and americium. That doesn't even count all of the heavier than air gases that will kill you in a couple of deep breaths. People are very squishy and prone to getting injured by things.
Yeah but I'm not super. How's he supposed to call himself super if he's weak to the same shit I am.
So is a kidney stone
Been through two medical fears already, catheter up my dick (3 times) and a broken femur. Kidney stones are still on my bucket list!
Boss brought his to work one day for show and tell.
"That came out your urethra?!"
As someone who has passed about a dozen over my lifetime... I wish you may never have to go through it. I'd rather have the catheters.
One big rock from space can wipe out the entire planet.
plutonium is also poisonous beyond the radiation it emits.
Most rocks are my weakness, if thrown hard enough
Yeah but uranium kills you after a bit, kryptonite takes him out instantly.
If that was the case, Superman would have died more than once.
I've not read the comics but I imagine hr has, a few times?
I only know of 1 time and kryptonite wasn't even used. Doomsday just beat him to death.
Depending on the writer, there are three consistent kryptonite types:
Green weakens him, but overall it doesn’t kill him. Strips his powers, makes him faint or just weak and nauseous.
Blue just takes his powers away either temporarily or permanently
Red intoxicates him or enhances his impulsiveness/brashness
There are others, but they kind of shift of just don’t exist in the main canon
I remember in a Lobo comic, Lobo grips a chunk of Kryptonite in his fist as he punches straight thru Superman's chest and heart, right out the other side! Don't fuck with the Main Man!
What if the uranium (depleted)is traveling over 1000fps from a GAU88? Checkmate atheist!
I believe the gau-8 muzzle velocity is around 1000 meters per second
Doesn't kryptonite just rob him of his power and severely weaken him? It's like uranium both the time accelerated.
Arsenic and mercury, both commonly occurring metals present in rocks, can kill humans immediately. Especially if vaporized. Uranium can kill and disable quickly in high enough concentrations.
Also, keep in mind it's a plot device about a fictional flying space alien with laser eyes. It doesn't need to follow the laws of physics.
But then they’re not rocks. It’s a vapor or a metal. That also actually disqualifies uranium as well since the rock isn’t what’s dangerous, it’s the radiation that destroys your cells. With Superman it’s literally just a rock.
You can brain anyone with a rock.

That's my kind of rock right there!
Rock + Isaac Newton = death
- get near the white house
- stop time
- summon a 1lb rock of pure polonium 212
- resume time
- profit
- get near the white house
- stop time
- summon a 1lb rock of pure polonium 212
- resume time
- ~~profit~~ die. You summoned 1lb rock of pure polonium 212 and stayed.
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