I've been rocked quite a few times, and theres other times where I've been pretty much KO'd. It doesn't hurt it, you just can't do shit in my expeirience. The first time it happened I got a haymaker to the temple boxing, fell back, everything turned green and i tried to hold myself up with one hand and eventually fell on my ass and crawled around attempting to get back on my feet but failed to do so and just laid down till i got my head on straight.
That was the worse.
Other times I've been sparing with the 4 oz gloves got rocked and instincitively shot in for a takedown. I told my sparring partner what had happned after that and he goes "wow, i was wonderin why that shot was much faster than usual".
Ive had a bunch but the last one happened bout 2 weeks ago got thai kicked right in the head...dropped me...adn then i fetl sick to my stomach and was fucked up for 2 hrs or so. I didnt like this feeling at all cause it kinda stayed around...First tiem its ever happened.
Those are my experiences.