When i go over a hump or bump in the road or some rough terrain, i hear this knocking or a thumping noise on the drivers side front. it doesn't happen all of the time, but i notice it the most when i go use the car from a cold start. Once the car has been driven for about 15 or 20 minutes, you don't hear it quite often, but i don't know if that really affects it. I cant feel anything while driving it, but you hear that it is something in the suspension. Anyone know what it could be? It started around when it started to get cold here and i thought it was something just due to the cold but it might not be. Any ideas?