One day when I was in elementary school, I put on my shoes in the dark and went to school at 7:30 am, came home from school around 2:30pm, and when I took off my shoes, there was a roach stuck to the end of my sock, its body crushed by my toes but its legs were still kicking.
After that, I learned to run my hands through my shoes to make sure there weren't any foreigh objects in there.