Theres loads of differant ones , like knocking the splitter down on dafs , taking the free play out of the clutch pedal ... pulling the abs fuse on scanias ... switching the ignition on and off ....
fact is you cant fiddle the tacho so any way you think these guys are making themselves go faster, your wrong and need to learn how to drive proper before lab starts tail gateing you and calling you names and giving you rude gestures