You can replicate the "supported at 6 and 12, stressed at 3 and 9" on your lap by:
- 6 o'clock, supported by knees
- 12 o'clock supported by hands (grip the rim like it's a very narrow handlebar)
- pushing down with the elbows/forearm at 3 and 9 o'clock
Very satisfying noises ensue.
DoctorBike