To unlock this achievement you have to score a 3-pointer on a fast break.
The best way to get this is to play one of the splash brothers, (Curry or Thompson).
You have to take possession from the other teams by any means necessary ie. blocks, steals, and rebounds.
You then have to rush down the court in a fast break and post up outside of the three point line and drain your shot, the achievement will pop. Good Luck!