Hmmmm.....this thing of the 'other pilot' keeping their hand at the base of the levers to follow up....bit dodgy.
The problem is if the pilot in charge of the thrust levers (the Captain? usually!) decides to abort the take-off.
If he's agressive in placing the T/L's to idle (as he should be) the other bloke better be quick to get his hand clear.
Before you jump all over me, try this yourself next time you're in the sim.
Put the start levers up, place your hand at base of the thrust levers (in a take off angle), now retard them to idle without removing your hand. See what I mean?
I'll bet it smarts.
Could be somewhat distracting to have a broken hand during the OGE actions!