Not AAS, but here it is:
I had a cellulitis infection in my hand from a cut, so I went to the doc to get a shot of antibiotic. While the nurse was drawing, she said "Looks like this is gonna hurt". I asked why and she said the the antibiotic was very thick. I was like "Whatever". She was giggling at my Tazmanian Devil boxers when she struck the fatal blow....
Well, about 1 minute, 45 seconds later "whatever" turned into a baseball in my butt cheek. It literally felt like someone hit me with a fucking crowbar. About 30 times. Took me 10 full minutes just to hobble past the counter and out to my truck (others now joined in on the laughter, including the rest of the nurses)...then I had to drive home holding myself up with one arm because I couldn't sit down.
2 days on the coutch for this jamboree of pain.