I did this with my wife years ago but never got that bad with her.. I laughed so hard at this: http://youtu.be/-xFaJUZRkQM
Awesome. I once picked up my girlfriend by the waste to carry her. As i stood up from the crouching position with her in my arms I farted incredibly loud. The volume increased as my bod got straightened out. So i dropped her and fell to the ground laughing as she was standing there uncomfortably.