They're the ones who have their left hand rested on the gearstick like its a trigger. . . . which inadvertently farks up the synchro hub and selector fork of 4th gear . . . . to the point it jumps out, and you have to hold it in gear . . .. anyone who drove in the 70's 80's will know this...
I still do it, and on occasion even racing if you need more lock and know there's a danger of losing it if you lose your grip, no power steering in my old crate and it can be heavy under load at speed, especially if you hit a bump or kerb.