You could use that trick as a way to get to translational lift regime if the helo is too heavy to lift off outside of ground effect. I've read of tricks where UH-1 pilots flying overloaded helos in vietnam would unload the tail rotor to get more torque available to the main rotor and lift off in a crazy corkscrew, flipping the helo off the ground and down a hillside where it could accelerate and gain enough lift to continue to fly. Sometimes it even worked.
Heh, my Father has some crazy stories about Helo pilots he rode with who learned to fly during Vietnam.
"Uhh.. aren't we a little close to that mountain?"
"Nah, Sir, we're getting free lift off of it!"
"Yes, but I can reach out and touch the mountain."
"Could you land a little further away from the trees please?"
"Don't worry about it, Sir, I've cut down whole trees before."
"Yes, but you're flying a Blackhawk now."