sometimes when i turn my wheels sharp, but not all the way to the end, but sharp, and i start to accelerate even slowly, i get like a "clunk"/"thump" noise. it only happens once during the turn, it's pretty loud too. an example of when it might happen is when i'm backing out of a parking spot, and when i put the car back in Drive and turn the wheel and let go of the brake and start to accelerate, it makes that noise...what can that be?

 

could be the upper strut mount bearings.