What is that buzzing noise?

So I'm sitting next to the tank playing some X-box when I hear this buzzing noise coming from my tank. Shine the flashlight in but can't see what it's coming from. After about 30 sec it goes away. A few minutes later I hear it again. This time I found the culprit. One of my snails decided to go for a stroll in my powerhead. Somehow managed to work his way against the flow and all the way in to the prop. Luckily I caught it while I was still up and this didn't happen while I was asleep or I think I might have ended up with a burnt out motor in the powerhead. Stupid snail.

 

haha that happened to me a few weeks ago with my maxi-jet..the intake cover came off and I was too lazy to put it back on..the next day I looked and it was packed with ceriths.