AMG__POWER

hey guys so after I put my new diffuser in I went for a little drive to let the air in the shocks even out (car was on jacks) and when I punched it with ESP on and off the car had wheel hop, I tried in comfort and suspension 2. it's never done this before. The rear shocks where replaced a year or 2 ago. Any input on what this can be? He car has Michelin pilot super sports on them, a bit worn out. Hopefully nothing to $$$