Whats wrong with my Hammer????

[hfp75]

I added a single head Hammer to my Nano 2-3 weeks ago and all has been well. Two to three days ago I noticed that one of the 'arms' looked like it was gone? I didnt really pay much attention to it. Today I notice that where the one 'arm' was missing now it looks split open!!!!! All the 'arms' also look a little deflated......

Is it dying ???? I have never had a Hammer before?

Any ideas? Could it be that it is sitting in the sand and not mounted/anchored onto the LR?

Here is a link:
http://i101.photobucket.com/albums/m...5/IMG_0434.jpg