Yeah, I love those odd fish at the lake! My dad thinks it's annoying when he tries to use the ladder on the dock and they all come swimming out from underneath and nibble his toes! He says it's kinda creepy. I think it's neat and it helps me not miss my pets so much when I'm away ;) My brother and I feed them worms, caterpillars, the occasional ant, and bread. One of the things I love to do is put on a mask and stand about up to my shoulders in water. Then I just stick my head under and watch them nibble at me and swim all around, through my legs, you get the picture - it's neat.
My betta doesn't jump, but he did just have a fun time trying to figure out what my cat's paws were when she was putting them on my desk (where his tank is) trying to get my attention. He was so cute, he spread all his fins out, swam over to where they were, and continually bobbed his body up and down trying to figure out what he was looking at!