I went absolutely apeshit and screamed. Most visceral reaction to Lost ever.

Me too! It was so unexpected. I went from going, "Oh, no Micheal don't shoot Henry!" to "Oh dear God, WHAT IS HAPPENING!" in like three seconds flat. I just never would have believed Micheal could kill anyone.

Heh. I was imagining some sort of cloaking device...which is exactly why it's a good thing that I'm not writing Lost. ;)