Poll. So, what exactly is Hit&Run?

all other magic is a waste of mana that does no harm to the defending side...

"Speak more, so that everyone's foolishness may be seen" (c) Peter I

All other magic is, for example, mass haste-prayer-word, bers, maybe teleport. In short, that which facilitates or makes possible a power hit-and-run.

Example from a real game - Shakhtyor attacks with 1 scorpicore and 1+200+1 Troglodytes, casts mass haste, strikes the wyverns, and on the last Troglodyte's turn buys himself out.

Another example, also from a real game - Valya attacks Kirill, both have 8th speed on their archers. Valya splits archers 60+1, moves forward with tactics, casts single haste on the 1-stack of archers, strikes the grand elves with the main stack, and buys himself out on the 1-stack's turn.

Added after 13 minutes

I generally don't understand the heated debate on this issue - at most, borderline hit-and-run situations arise in maybe one game out of 100 (if even that) and are easily resolved with basic common sense; coming up with something in advance and competing in pedantry is, IMHO, not worth it.

A real-life example of where vague formulations and attempts to rely on common sense lead - http://www.forum.heroes.by/viewtopic.php?t=677&postdays=0&postorder=asc&start=0