The motion of one who staggers.
That which staggers something or somebody.
In animation, the repetition of a sequence of frames to show struggling effort
Sway unsteadily, reel, or totter.
Doubt, waver, be shocked.
Have multiple groups doing the same thing in a uniform fashion, but starting at different, evenly-spaced, times or places (attested from 1856).
Incredible, overwhelming, amazing.