to pull a petris - the action to leave conference or a group conversation for a couple of minutes without telling anybody , and then return at a random time .
bob : so guys how about meeting up at 8 ?
bill : it's ok
jhonny : perfect , but i have to be home by 9.
bob : sucks , jhonny can you pick me up on your way ?
bob : jhonny ?!?!?
bill : he just pulled a petris on us again !!!
( 5 minutes pass )
jhonny : you gyus still here ? i had to go do some random thing