Petrol pump
Victim is floored, arms out-stretched. Someone kneels on the elbow joint and the arm is pumped up and down. Often initiated with the question "Would you like leaded or unleaded?". Requesting "unleaded" possibly led to a less ferocious pumping but probably relied more on the benevolence of the initiator.

And I suppose if the kid started crying, you could all go "thar she blows!" and dance around clicking your heels and whooping, as though you’d struck oil like in them films. That sounds fun. Susan.
written by Ty*anno*aurus*Fle*, approved by Susan

A rather more fun (dangerous? fun? same thing...) version involved placing a steel chair on the torso of the victim so as to pin both arms to the floor above the elbow. Then, the heaviest kid we could find would kneel on the chair and proceed to give the poor bugger a double petrol pump... I think at the time of the idea's conception we were supposed to be practicing the recovery position in the First Aid element of PE. We all passed and got certificates.
written by Ri*h V*S, approved by Log