Male drone bees were used in the bee scene as they don't have stingers and therefore could not harm actor Dominic Monaghan.
The rocks used in the waterfall cave set were made of rubber so that the sound of the actors and crew members walking over them are not picked up on camera.
Sayid is from Tikrit, Iraq, the town where Saddam Hussein was born and later captured by the U.S Army.
Dominic Monaghan, who plays Charlie, likely had no issue filming the scene with real bees, as he has shared he loves insects and interacting with them.