Blunt trauma by falling light

I was installing new lights above my plants today and I accidentally let one end slip and fall hard on just one side of the plant. I lost about half of the very top bud spot (plant is untrimmed from birth) so I just cut off the whole tip--I thought that this tip would not heal completely so it would be better to get it out of the way. I also lost several other leaves and branches and the main stem bent a little.

Basically, what is the plant's capacity to heal from this sort of physical trauma? This is my first grow, so I was not expecting huge yield out of her, but I'm worried about the rest of the plant.