Halo on XB connect

I was wondering if it's possible for people to play online with some sort of game genie like device on halo. Last night I planted a melee from behind on some dude and he didn't die. I then shot him 3 times from short range with the shotgun and he was still alive. I tested it and even with overshield a melee from the backside will still kill you. I can't understand it?????????:huh:

NO

Booo...cheating..

Although it is possible to play online hacked halo by having the same mods on as the other xbox, which means both xboxes need to have the mods or else the game immediately goes out of sync :p

was it lag?? it could of been a very bad lag? and hacked xbox don't work with other xboxes unless there are also hacked