hi,
I'm working on the rocket tutorial from chapter 2 in Maya 4.5 savvy.

You have to make a groundplane and rocket, then animate the rocket with some keyframes in cartoonstile (squashing/stretching before it takes off), after that you make both objects passive rigid body and add gravity field to the rocket.
Now it's supposed to bounce when it hits the ground, but mine doesn't do that nicely. Also, there's a difference in the rocket's movement when I slide the timeslider or when I just hit play.

Anyone know what might cause this?

I'll add my file: