if you come from behind an enemy and hold L(for a long time) you will pick him up in a fireman's carry without him touching the ground
The endings on the xbox verson are different then the 360 verson. The endings on the xbox verson are determined on what you do at the end of JBA HQ part 2.
Both endings have Enrica dying and Sam on the run from NSA. The only difference between the two endings is a quick 30 second news clip.
Bad Ending - If you chose to deactivate defusion of the bombs at JBA HQ
Good Ending - If you managed to defuse both bombs at the JBA HQ
Normal - Ending If you managed to defuse only one bomb at the JBA HQ