My denial league story is not a bathroom break but it was equipment failure. Basically, I bought a pair of new road pants (the greys) and didn't have time to try them on... just grab and go to the game. I grabbed a pair without looking and basically bought a pair of really extra large pants. I had a belt, so I thought no worries. In the fifth or so inning, I hit a double (gapper) and thought about going for three. I hit the breaks rounding second, dove back to the back, go up, dusted myself off and realized my pants were now around my ankles. I busted my belt.
The second baseman was laughing so hard he couldn't throw the ball back to the pitcher. I begged the umpire for a time out so I could go beg someone for a belt.