[RedDevil]

I remember research on a group of cyclists revealed that the best position in a group is not at the back, but just in front of that; what made the difference was the other cyclistst bow wake which the last in the group obviously cannot use.
The wake was said to extend almost indefinitely forward, but gets insignificant if you're not close by. In a group, the wake and the draft of the object ahead can have a combined (positive) effect.

If you get hit you will usually come loose again. No need to hit the brakes while still attached, you might lose control.

My wife's aunt was hit on the motorway by a truck when traffic slowed down.
Her Renault Twingo came loose only to be hit again, now on the drivers side; the grill logo filling her door window.
Was pushed around like that for over a kilometer, until her wheels were worn so far down that the bottom of the car touched the pavement and began to smoke heavily.
The truck driver, who was just keeping up with the next car in front, finally noticed the smoke and honking, gesturing and signaling drivers and went to the emergency lane to investigate.

My wife's aunt came out of it shaking but unhurt. Bought a bigger car.