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This is a pretty good some up of the difference between things as they appear to be and things as they really are.
(hexbear.net)
I suspect a lot of people have difficulty recognizing that what they believe about the world may not be representative of how the world actually behaves. I certainly do, frequently.
Like with politics, people think they need to go vote and march and stuff to effect change, but if you're willing to accept the idea that there are limits to your ability to perceive the world and your perceptions are misleading, you can pretty reliably go and see that isn't true.
You can also decipher deeper realities like you can basically put whatever you want on flat bread, or that you dadskf;'akse'wfaegqrwt;'lj'a fuck my brain. I'm asd I'm not sure what I was trying to say.
You can also spray a condensed gas through a door with a PIR on the other side. Only really secure building I worked in was for one of those Billy Budd type people who were really good at some niche technical thing and just hired enough people to be able to focus on the part that they found fun. His shop was in a squat brick building with steel doors that you had to press a button on the inside to open. There were well built steel edges to the door so that a hangar or some other means of attack could not be slipped around.
Yes! It wasn't consistent, but we were able to get that working with canned air a few times. Double doors worked best where you could get closer to the PIR above the doors. Holding the can upside down worked best, iirc.
Awesome to hear this actually working! I wonder if holding it upside down works best bc it grabs the coldest fraction of gas and causes the biggest temperature differential for the PIR?
That's my thinking. Most of the PIR aren't very impressive and they're just looking for that temperature change, it doesn't matter which direction. I actually wonder if maybe the paper trick works when it does because it moves the air flow from air conditioning around.