Crash helmets.

Langley, Buckinghamshire.

Various shots of two motorcyclists riding down the road, they signal and turn into a side road, camera pans to sign for 'Road Research Laboratory'. Interior M/S of glass flask which represents a head. It is put on a pole and raised slightly then dropped, it smashes. A normal cap is put on another flask and raised slightly higher then smashed. M/S as they put a crash helmet on a flask, they raise it to different heights and drop it but it doesn't break.