Not setting the clocks forward for day light savings and showing up with my entire family for church just as the service was ending.
I'm about 14, sitting on one of the wooden church pews. Dropped my bulletin, leaned over to get it, and let loose an accidental fart.
Just in case you don't know, nothing amplifies a fart like a wooden church pew. Everybody in that church heard it. My buddies had tears running down their faces. My mother acted like she didn't know me.