Diablo III Wizard Invincibility Exploit
There have been reports of an exploit found in Diablo III that can make you invincible if you are a Wizard. It apparently works in any game mode. Blizzard is likely working ASAP to fix this loophole within Diablo III.
From the Blizzard Forum:
Step 1: Select Teleport - Fracture. Bind it to a key
Step 2: Select Archon, tested with Improved Archon
Step 3: Hover your mouse over or near your charcter
Step 4: Press Teleport
Step 5: QUICKLY(!) Press Archon