I've noticed people running quickly, just assumed that they were carrying a small light-weight gun as you can run faster like that.
Some games yesterday i've had a lot of air-support come down, others hardly any, bit random.
Indestructible, well i'm pants anyway but sometimes i've been suprised people haven't gone down even if i've shoved a few rounds into them from fairly close range... I had juggernaut armour & got swarmed by people so that was no use!
Spawning is crud though, get fed up with being put right infront of someone & never seem to have that happen the other way round so I gain from it!