LOL. I have the opposite problem! Night Heat or Damper will just want to keep going and going after a jump! I have to really sit deep and pull to get them to walk again after a jump.
Once you have gone over the jump, keep your legs firmly on and keep squeezing if she makes a move to stop straight after the jump. If she carries on nicely after a good few strides, pat her and then slow her down so she knows that she must carry on going until you tell her to stop.