Assisting a Lift

[Junkfist2]

Two players lift an object together, allowing them to move it at walking speed.

The first player to lift it "drives" it.

The second player uses the Lift action on the player lifting.

He "backseats". If he clicks anywhere else, he lets go and the first player goes back to lifting it solo.

[kaka]

I think this should especially apply to larger/heavier objects, e.g. the currently immovable boulders.