The mechanical horse was carried on the back of a truck, followed by another truck with a camera, and Graham was supposed to leap into the mechanical horse’s saddle while moving (supposedly jump-ing from another horse).
This being television, they filmed the scene many, many times to ensure enough footage to get the effect they were after.
And staggered on, muttering, ‘I knew I should have worn a cup this morning.’
When they finally stopped, Graham staggered downhill from the road where they’d been doing this, pausing by me and Anne Kenney (brilliant writer of the other episode in that block of filming) to say, ‘I’ve just been having a conversation with my balls.