Oh man...did not ever want to think about this again. I was 10 and at church choir. I was not feeling well in the gut and could almost not move without feeling like I was going to crap my pants. I hated using public bathrooms and after church I very carefully started to walk away wheeling my Raleigh Rampar BMX. I sneezed and slipped and fell on the damp grass and just as I lost my concentration the worst happened and diarrhea was flying.
Of course there was another kid just walking out and he was like did you just **** your pants?
So my worst biking memory as a child was riding home two miles on my Rampar while standing up because I had a load in my pants (of course they were corduroy and brown). Got to love 1981.
The minute I walked into the door, my Mom said "Let's go bowling". I ran upstairs and hopped in the tub to wash my ass and tossed my soiled tighty whities in the hamper and went duckpin bowling :-)