Ate too much. Who the hell needs special powers or kung fu moves to incapacitate someone? Just give them too much food.
Mum's cooked for four people for God knows how long, so tonight she served up a meal for four on two plates, seeing how Dad and Jason are in Heywood keeping Grandma from losing her mind further. I dunno how I got all mine down, but I did. It would be bad manners to do otherwise.
I didn't really hit me until and hour later. The effect doesn't just give you stomach cramps that won't go away, there's also the lethargy as you blood gets busy with the processing stuff. By over-eating you effectively prevent yourself from doing anything else effectively. I'm starting to feel better now, though.