Note on LN2: Please be extremely careful if you do LN2 experiments. A friend of mine who works for MOX told me one incident with their client. They spilt LN2 on the road but didn't clean it up. A dog came along and licked the LN2. Dog didn't realize what happened until a short while...and then its tongue just broke off and the dog squealed like there was no tommorrow.

Guys...LN2 accidents can happen to us too...and it is NOT funny. You will be utterly horrified for life if you lose your limbs or even part of it...just because you wanted to bench using LN2...