I let fall the following ball on/in a passable block (water). I really get stange behaviour (the ball becomes like a shark, hehehe!) . What do you think about? Is there a way of improvement?

code:
VAR earthgravity[3] = 0,0, -386;

ACTION physik_ball
{
ph_setgravity( earthgravity );

phent_settype(my, PH_RIGID, PH_SPHERE);
phent_setmass(my, 50, PH_SPHERE);
phent_setfriction(my, 90); phent_setelasticity(my, 90, 10);
phent_setdamping(my, 30, 20 );
}