I'm in Mt. Greenwood and just getting into brewing. I was actually planning on stopping by the place on 100th and Western to see what they have in stock.
I witnessed a safety-disk burst on a nitrous tank in a car once. The owner forgot and left the bottle heater on...The pressure built up to 2500-3000psi(about where the factory disks are set to burst). 100 people in the parking lot around the car and nearly everyone jumped out of their shoes...