One summer I lived in a room of my fraternity house with three other guys. It was a pretty small room (for 4 people) divided into two sections. When you first walked in the door, to the left was the sleeping area, and straight ahead was a living area with TV, couches, and a bar. Since I was the one that hooked up the room for the summer I had the better of the three beds. It was a huge loft, probably 6 feet wide by 8 feet long. Two of my roommates slept directly underneath my loft. This summer has been referred to as the "summer of love" for me because I hooked up with quite a few chicks. We literally went out to the bars every night except 6 nights the entire summer. One night I decided it would be a good idea to call my ex-girlfriend for a booty call.
We had been broken up for a while and hadn't even spoken for a couple of months. That didn't seem to matter, because she was over in about 20 minutes. We all hung out for a bit and then finally the ex and I climbed into the loft. The roommates were directly below us, but I could have cared less - my ex and I started going at it like the good ol' days.
Now during this time (mid 90's) there was a popular commercial out for Little Caesar's Pizza featuring Evel Knievel where the punchline was "Are you feelin' it Evel?" I thought that would be a funny thing to say during sex, so you know what happened next. We were going at it and I started smacking her ass really loud and blurted out "Are you feelin' it Evel?" My friends about died from laughter, and still joke about it to this day.