I usually bump start after short coasts. I've yet to see ill effects.
As has already been pointed out, bump starting in a higher gear than you'd be driving in at that speed is ideal. It smooths it out a lot.
In my car, for example, if I'm coasting at 25-30mph, I can bump start in 5th pretty well. As soon as the engine fires up, disengage the clutch, and shift into the gear that you'd normally use at the speed you're traveling at.
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