Level up craft hack?

[Nekodar]

from 22 to 50? in 1 minute? with only 1 job (this guy is archer 11 and carpenter 50)

Didn't see the timestamped version of the pic, but from the achievements it's obvious that some sort of exploit using Levequests was used there.

Edit: And as it seems the user started doing it at level 20, it involves the triple turn-in levequests.