Update: It looks as though there is no hacking going on; it is just the luckiest glitch on the planet. If you see someone with the glitch, I guess my only advice would be watch out and avoid the glitched player, or join their team.
So lately I have been playing Medal of Honor Heroes [...]
ok then btw do ant of u play "CombatArms" its a fun game 5000 ppl on EVERY FKIN DAY!!!!!!!!!!!! 
Ok, I can now officially do this invincibility glitch anytime I want to. Figured it out 100% =] hey guys remembr me im the 1 w/ the Thompson & shoots u in the back w/ it ;) anyway ... hey i back & wrapitupgud is a haxr cuz every time i i join a game w/ him in it ...
i have tiger lol. and numnutz ggs in our melee fight 
i thnk austin hicks has the best solution 2 do the glitch lol thts stupid tht wont work wow we have 2 do the rumba 
i had this glitch last week and evened out my kill/death score :P 
TIGERSHARK27 i have played numnutz but he was cheating when i playd him i acctually wooped his ass =D
sorry ment ...