60W CO2: Metals

[Benm]

Slicing through a razor (4.2MB):

Now that is classic

Back in the day of the ruby lasers, the 'gillette' was a measure of laser power (i.e. the number of razor blades one could punch through with a single shot).

One other crazy dangerous experiment that would be interesting: a lithium battery. Probably best performed outdoors very far from anything of any value