flushing the toilet makes shower water hotter or colder depending on its setting...but...still you flush before you start the shower..or make sure the seat is covered.
Hope you didn't hurt yourself too badly :]
Three things.
1. You can reach into the toilet from your shower?
2. Your first instinct was to stick your hand IN the toilet? Next time reach for for the outside of the bowl.
3. I feel for you, man, but that was really dumb.
#1 or #2?
I ef-ing hate people who don't flush!