on falling you have set the vector position to -700Y, not really sure what that's for.
Also, i dont think you need the Player box object. You can set the collisions of the raptor to bounding box and give the raptor sprite platform bahaviour.
Thanks for the reply. I used the platform game tutorial which said to use a playerbox, is there no need?
The falling set to -700Y is only set to happen on collision with the enemy, so the player bounces back on it. That has nothing to do with the terrain.