Ok here's the question: How can I make a projectile (PHYS_Projectile), change it's rotation perpendicular to the surface it has collided with (with HitWall perhaps?) If you're not sure of what I am talkin about, check jpg in the attachment. Please I will appreciate your response. Thanks ![Smile :) :)](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)