A truck driver starts truck driving school. The instructor asks him this question "Your driving down a steep mountain and your brakes fail do you A) Start blowing your horn and hope everyone gets out your way till you can get to the emergency truck ramp. B) Cram your transmission into a lower gear and hope the engine slows you down. or C) Try to jackknife your semi hoping that going sideways will slow you down.
The Trainee thinks for a moment and shouts out D!
The instructor says "D? I didn't give you the option of D! What is D?"
And the trainee reply's wake up my co-driver cuz he has never seen a wreck like this!