from what i've seen on a friends RX-7 during a quarter mile run, he slammed it from red line in 3rd to 2nd cause he mis-shifted into 4th (still to this day do not know how he managed this) and all that happened was the rear wheels lock up until he realised wat had happened about 3 seconds later and put it back into 3rd.

after the run, we jacked her up, had a look and all was good from wat we cld see. got it back home and had it booked in to be inspected. no damage.