Before MWLL i used to jump on moving tanks in crysis wars to kill them by shooting their exhaust vents with my battle rifle. I got very good at this as missing the jump was a matter of life and death, don't wanna lose to those tank whores! if it was an apc i would drop c4 on em and jump off, the damn apc's use third person and blow you off with HE missiles by shooting the nearest wall point blank.
I eventually got so good i could time jumps perfectly and land on speeding trucks. my pinnacle of jumps in MWLL though would be the time i mounted a low flying sulla with one try. I don't talk about the perfect mount on the shiva though because it was like a bug hitting a windshield ( i died).
It's a matter of practice my friends! i got good because there was more at stake in crysis wars power struggle, losing meant your whole team got nuked over and over, winning meant you got to nuke the enemy team over and over. Hahahahahaha... oh so satisfying.. so much rage from them..