[rdcbn1]

8500 fpm climb, just damn! Aggressive climb for sure

That's just plain smokin’

[Tom Tetroxide]

Depending on how heavily loaded a 737 is, a climb rate of 3,000 to 4,000 fpm isn’t uncommon.

With all that kinetic energy after a drop like that, as long as the aircraft doesn’t exceed the posted Vne in clean configuration, hitting an 8,500fpm climb rate is within reason.