Objects randomly collide with world causing massive frame drops

[Pentiman666]

so ill be going around anywhere in the game (in a building, walking around the world, etc) id kill some enemies but randomly the physics engine starts freaking out and my frames kill themselves. i know its collision based because ill hear or see bodies or objects seem to "stick" into the ground or a wall. is there a way to fix this? its hard to play them game when this happens cause the frame rate literally drops below 10fps