One common occurance would be that someone would come in and ask about the setlist before the show even started (timezones are haaaard), so people would say random things. Uno, Pink Ego Box, Jimmy Kane, Creep.... then one time I was typing out the words to jimmy kane and I typed in "sexy plaaaaane", so that would be coming up when people asked what was played.
One night, can't remember anymore how it got started, we ended up making jokes about being on a plane, I made the original stewardom photoshop, and it turned into a silly joke wherein we were on a "sexy plane", piloted by jimmy kane, flying over the gig. It's pretty much continued and expanded somewhat since then. It's mainly just a silly jokey thing to keep us occupied when waiting for the gigs to finish, so it really has no deep meaning (takeoff when the show starts, turbulence when there is setlist beef, low visibility/fog when there are no updates, barf bags coming out for feeling good)