Good vegans ride round with their mouths shut, but the rest are in danger of swallowing a fly at some point.
When it happens - gag, cough, spit - remember the green goo in the middle of a fly is 100 per cent protein. If you forgot to pack your energy bars, scooping up a juicy blowfly could power you up the next hill.
BONUS TIP: Try not to get obsessed with finding a spider to swallow next. Who knows where that might end.