He was actually messing himself

I was in the local park sitting on a bench, and I watched a boy of about 18 lean against a tree and I could tell from the way his knees were bending that he was filling his pants. I asked him if he needed any help and he said he was okay and would fingers some local toilets. He also had a big wee stain in his shorts.
Would love to have taken those shorts and pants down! Wonder how he got on?