SACRAMENTO (CBS13) — An unruly passenger who witnesses say was smoking a vape pen on the jetway allegedly knocked over a flight attendant on Tuesday.

The incident happened on a flight departing from Sacramento to Salt Lake City.

READ MORE: Body Of Teen Who Went Missing While Swimming In American River Found

Video of the incident captured the audio of the confrontation.

READ MORE: UPDATE: Only 2 Drowned In Tuolumne County Swimming Hole

Witnesses say the passenger was smoking a vape pen on the jetway and was confronted by a flight attendant and the pilot. He then got off the plane, but apparently tried to get back on board to get a bag.

The flight attendant told him he couldn’t re-enter the plane, which prompted the confrontation caught on video.

MORE NEWS: Shooting Puts Roseville Target On Lockdown

Delta officials confirmed a passenger was removed from the flight during boarding.