I have peed my diaper before when wrestling with a friend.
I remember as a kid when I was 8 years old I was wearing a diaper and I would wrestle with my friend and I was already partly wet.
While I had my friend down on the ground I peed my diaper some more and it was so great.
Not having to get up from playing to go pee and just peeing the diaper without anyone knowing is an awesome feeling.
I also pooped my diaper as well while wrestling with my friend as well.