You are a security guard at the Moscone Center in San Francisco. There are hundreds of dollars inside a six hundred pound block of ice. You cannot leave your station. How do you get at it?
Using an ice pick? Why would a security guard have an ice pick? Maybe if it were Chicago, but this is San Francisco.
Use another tool to chip away at it? I dunno, that's a lot of ice.
Melt the ice somehow? Nice idea, but how?