Go to Local Play > Practice. Then choose Spinal as your main character, and any character as a dummy.
At the start of the match, press Start (menu button) and then press LB or RB twice to get to Practice options. Go down 4 options to Instinct Meter, and press right on the d-pad twice and it will be set to Infinite. You do this so that you can last in the mode forever, in case you mess up a few times.
Then just press RB and RT (heavy kick and punch) at the same time to activate Instinct Mode (might take a few tries if you are bad at the game like I am). Then just input quarter-circle forward and any punch (I chose to use the left stick for the quarter circle, but some PS3 / Tekken fans might like to use the D-pad). Quarter-circle forward is moving your left stick down, and then in a continuous motion sweeping it in a circular way to the right (or left if your character is on the left side) and then press X, Y, or RB (defaults for punch).
Might take a few tries to land it (if you suck at the game like I do). Once it lands though, you will get the achievement.
Here is a video below to demonstrate it in a simple way.