great execution of what? is this a cosplay of something?
Some people use benadryl like a recreational drug. From descriptions I've read it just sounds horrible, your vision gets artifacts that look like spiders over every surface, some people see a man with a hat, which is what this cosplay is supposed to be, and I'm probably forgetting other stuff. There have been a number of deaths associated with people doing this to themselves.
I once took Benadryl for allergies, not knowing of its side effects. I took it on my way to a full eight hours of sitting in an overly warm room (it was on the second floor of an office building with a broken AC and an ancient projector was running in the middle of the room ... In August, IIRC) listening to someone lecture 20ish bored people about how to do our then-new job. The best I can say of the day is that I managed to stay technically awake.
I'm pretty sure that was also the last time I took Benadryl. I would not describe the experience as enjoyable. I've taken similar medications since then and have appreciated their efficacy and aid in getting to sleep, but I can't imagine taking them recreationally. No judgement to anyone who does, it's just not something I can interpret as fun.
edit: Though I never saw the Hat Man (unless he was incognito as the lecturer). Maybe that's the fun part.
It's referring to how using Benadryl recreationally will make you see the Hat Man at the end of your bed
https://en.wikipedia.org/wiki/Shadow_person#The_%22Hat_Man%22
Ok, sure, but what do the giant knockers have to do with it?
Some people just have huge knockers.
It’s to make sure you see Benadryl first.
Awful Taste But Great Execution
For when their taste is awful but execution is great