FACILITY TIP #1
There are many opportunities in the FACILITY to cook an opponent though a wall or floor. Here is one you may have known about, but maybe not. At the very least you can see a picture of the explosion as seen by your opponent! You can use this spot to cook an opponent up in the bathroom.
There is an odd coloured ceiling, right above the doorway.
Throw up some mines and remember the more the merrier!
BOOM! Nice juicy explosion which can cause your opponent some serious pain. If you're using REMOTE MINES, you can always setup this explosion and walk elsewhere in the level while waiting for the perfect opportunity to trigger the explosion. Since this is such a high traffic zone, it's very effective in a 3 or 4 player game.