You may have been on some sort of VOIP but I doubt it was vent, unless of course you were also doing some dodgy time travelling.
And the simpler explanation of "a hell of a lot of confusion and quite a few reporters wouldn't be able to tell you what WTC7 looked like if it fell on top of them" didn't occur? Instead we need to work out some sort of impossible demolition mission instead.
It may have been teamsound (defunct) or teamspeak - its a long time ago - everyone tends to refer to most forms of VOIP as vent in the gaming world anyhow.
These were things its a bit hard to get confused over coz you couldn't have known they were happening til they did - it stuck out at the time.