United Kingdom, Sept. 28 -- Huey Morgan left U2 convinced he was a "f****** psycho" by smoking a joint on a private jet.

The Fun Loving' Criminals frontman, 57, made the admission while describing the extraordinary highs and darker moments of his life - from petty crime and time in the US Marines to global fame as frontman of Fun Lovin' Criminals - in his new memoir.

He said about his time touring with U2 during the Irish band's 1997 PopMart tour in the United States, where Huey says he witnessed the lifestyle of "real rock stars": "This wasn't some small private jet, but was a big old girl they named Air Lemon, with first-class seats, a few spacious bedrooms, a massive galley and a private area for the U2 guys.

"I'd never seen this ty...