“Tower, American 1997. We just passed a guy in a jet pack,” an American Airlines pilot stated in a call to the control tower.
“American 1997, OK, thank you. Were they off to your left or right side?” the tower operator asked.
“Off the left side, maybe 300 yards or so, about our altitude,” the pilot responded.
“We just saw the guy pass us by in the jet pack,” a pilot from Jet Blue Airways then told the tower, which warned another pilot about the sighting.
“Only in L.A.,” the air traffic controller said at one point.
Edit: The incoming report from the pilot is at 7:23 of this file: https://archive-server.liveatc.net/klax/KLAX4N-Final-North-O...