Invite your friends over and get them to hide in the closet. Then, get your girlfriend going doggy style and quickly jam it in her arse while grabbing her hair and yelling "Butt rodeo! Butt rodeo!" Then, have your friends jump out of the closet and turn the lights on while you try to hold on for 8 seconds.
Butt rodeo! Butt rodeo!
When you are doing a girl doggie style and all of a sudden say either, "your sister was better" or "my sister is better" and hold on for dear life until you are "bucked" off of the girl.
Steve: Yeah I got 8 seconds at the Butt Rodeo last night!
Bob: Sweet ass! Did you say your sister or hers?