Cut exhaust pipe...

This may be a stupid question, but how do you guys cut your exhaust pipes?

I am installing a complete system, but the head pipes need to be cut to custom length to meet up w/ the headers. It's 3" pipe.

For the record, I don't have a metal-cutting radial saw or anything like that. I guess a pnuematic cutter disc would work, but my bro has my compressor. Any other easy ways to cut it?