Marijuana lovers Cypress Hill hate to fly - because airplanes are among the places they can't smoke weed.
The hip-hop trio admit airline anti-smoking devices are so advanced nowadays they can no longer cheat the system like they used do.
The group's B-Real tells Hustler magazine, "We were on a flight in maybe '93 and our tour manager at the time was really addicted to weed. He could not be somewhere and not smoke.
"He went into the airplane bathroom and figured out how to do it... so I went and smoked in the bathroom. The toilet and the sink, they both suck air down. So you just blow the smoke in there.
"That will never happen again. It was a good trick while it lasted."