Helium

[gillywibble]

Is it bad for you to inhale it? Are there any reports of long term damage?

 

[gillywibble]

EDIT: What do you mean by inhaling though? Sucking from a balloon or something different?

I was interested from a balloon point of view.

I didn't realise divers used it. I presume they use an oxygen/helium mix to avoid the bends from Nitrogen?