the "gravity drop" has been removed - ppl kept fallling through it when it was closed (

). If the shopkeeper is been attacked he just closes the shop window - simple!
The surveilence room has 2 security panels linked to camears around the map. Also it has a one way invisible wall so you can spy on ppl without them seeing you or using camears - there is a teleporter that teleports you (suprise, surprise) to another viewing room that overlooks the killing zone. Also in this room there is weapons and music changer buttons.
Any other questions?