Anyone who has ever lived with a roommate or in inexpensive housing has most likely had to deal with the thin wall dilemma. When those noisy neighbors or raunchy roommates bring that significant other home for the night, you probably knew about it.  I use to have a neighbor above me who was overdue for a new bed frame. How do I know? I heard it.  My roommate and I would time him and whenever he beat his old time, we would cheer loudly from our basement apartment. It never hurts to hear applause after a performance...

I will tip my hat to this guy. Not only does he have to deal with hearing his neighbors get it on regularly, he has made the best of a bad situation by challenging himself with different tasks to finish before they do.  There a 27 total challenges so far and they keep getting better.  It's best to start with the first one, but you can see the rest on his Youtube channel.