A guy called Martin Willett as an occasional project called "Smitecam" where he runs a webcam trained on himelf and invites God to strike him dead.
The purpose is twofold. Firstly, it publicises his athiest web site and beliefs. Secondly, it does challeneg the way people thing about God. For example, if Christians prayed to God to smite him, would that be sinful? It would prove that God exists. However, killing is against the ten commandments. Can God break his own commandments? Apparentlyhe can as he ordered Abraham to kill Isaac.
Although Smitecam is a publicity stunt, it is quite thought provoking.