Looney Toons gas gauge

Beginning last week, my gas gauge needle bounces erratically after the car hits bumps of any significance on the highway. It remains otherwise accurate. This problem is semi-amusing but eventually gets very irritating...

Post script:
I have nothing but praise for this site and its moderators and other contributors. I was disappointed to read "edna"'s reaction (that is, gross overreaction) to Benzmac. It was entirely unwarranted.
Just keep up the great work!