I am VERY excited about the ICE LOCKS from Mr S. In fact, I have two in my freezer at this very moment!
The concept is simple yet effective: There is a cylinder that you fill with water, then freeze in the freezer. You then use padlocks to secure yourself or another guy, and the captive has to wait for the ice to melt before the ice lock opens and he gets out. If anyone has any ideas or suggestions for using these, please let me know.
Click for Mr S