Tekken on Cross|Up - Side Step out of Crouch (foreground)

Hold down, tap and release up, then release down. Now you have a fantastic option out of your crouch!  
Ensure that you go to neutral after the tap and release of up, so you can guarantee the side step. 
 You can also press down again, after the side step, to start a walk if you need it for that punish.

Happy Training!