Mr. Bill was freaking out about a glowing cloud of dust that no one else could see. He wouldn't stop talking about it --
"Do you see that? Do you see that? Yo, Akronon, do you see that?!!!!," while the rest of us were doing our best to blow up the damn headquarters. I bet he got killed 3 times while trying to figure out what the hell was going on.

Bill -- here's the link to the IW post on the same topic, with pictures:
http://www.infinityward.com/forum/viewtopic.php?f=9&t=12445&view=previous&sid=ad5287714fb94c8df260f71b73f5e7a8

For the rest of you, if you see a cloud of smoke or fire that won't go away -- avoid it or suffer the consequences of super-lag.

i fucking hate that shit its annoyin as hell happens a lot on shipment cause there is so many granades and smoke granades and shit being thrown.

that thing is weird