I worked with a Mississippi country boy that almost drowned doing that. He went under water and reached into a hollow cyprus stump and a very large catfish ended up grabbing his hand. He couldn't fit the catfish out through the hole in the stump. After a couple of anxious minutes of tugging, he got his hand free. When he checked closer, he found that there was a larger opening on the other side of the stump that the fish used as an exit. He was a lot more careful where he stuck his hands after that. Never the less, it looks like fun to me.

Jim Smith