13.
I had been sick for a couple days and my sister was moving. My parents made me go to my sisters house to make her move. Every 5 minutes, i was running to the bathroom to relieve my ass. I tried to stay away from lifting heavier objects, as I knew lifting them would only result in catastrophe.
My dad called me over to lift an old, heavy antique dresser. I resisted at first, but as he urged me to come over, I had no choice but to risk it and take the chance.
As I squatted, I already felt my impending doom making it's way out of my asshole. I try as hard as I can to pucker up, but as soon as I use force to pick up the dresser, I feel the hot lava diarrhea run down my leg and into my socks (I was wearing shorts). Laughter/screams erupted from my family and I knew nothing would be the same ever again.