In springtime last year in Bergen, we're waiting for taxi clearence as a Norsk L2 rolls up to the spot in front of us, his nosewheel goes 90 degrees in a thight left turn, and oops, suddenly the left main wheel is airborne, really scary. Similar episode happened a couple of months earlier, according to two of my colleagues who witnessed that one.
The copilots in Norsk are not allowed to taxi, so I guess the captains where on the controls on both occasions.