A couple of mates and I use it in real life now... It started out in game
"Hey, how far away are you from the rez?"
"8 seconds out" (We use 8, not 7)
"Roger that"
But has seeped in to real life as an easy way to say 'nearly there/on my way/one second':
"Hey, we're already at the pub, how far away are you?"
"8 seconds out"
...