It was a lot more amusing in person, but I was feeding my two ADFs and they always gather in one spot when they see the other is getting fed. Well, I put a big clump of bloodworms in between them and I'm not sure if one of them bot stuck on the other or what (cause I can't picture the bloodworm being so strong that it wouldn't rip in half from both of them pulling on it), but they were pulling and pulling at each other for a minute. I had to run and get the digicam 
1st video
2nd video
1st video
2nd video