Taking silly selfies to the extreme

My waterproof trousers drive me up the wall sometimes. They're aimed at hikers, but they're so flappy they're forever getting stuck in the chain, and I've described them as being baggy enough to hide a badger up each leg. Today I was struck by a daft idea, and couldn't resist trying it out.

So here is a "before" photo. I haven't lost weight, I'm a size 20, the same size as these trousers, which incidentally are just right on my weight. And yet here I am, with both my legs in one trouser leg, trying to take a photo before I giggle too much and trip myself up.

Anyone know of a slightly more cycle specific brand of over trousers which go up to a UK size 20?