if you are playing as kung lao, you can his spin and get a free juggle out of it.

everyone else, just jump back or forward and enjoy a free combo.

An uppercut will work with every character, but other counters will be character specific. Which character are you using? The timing for the uppercut can be identified by going into practice mode with her--do her telestomp a few times to get an idea of when to execute the uppercut.