A few days ago, possibly weeks, you ate a ball. Don't ask why. One of them round bouncy balls. Perhaps its just a dream---come true. And not the good dream come trues, the bad ones. It makes your body round and makes you grow. Your single and the last person alive. Apart from flies who badger your stomach, you can't exactly shoo them.

Flies were swarming you "SHOO!!!! BUGGER OFF SHOO FLY, SHOO!!" You bark