Construction on the road up the street from my house has been going on for the last couple of weeks. I was going to work in the morning and hit a raised bump that was paved over. I most def bottomed out and heard a loud sound. Thought my oil pan dropped out...

pulled over and checked, no oil leaking, no damage. Drove another mile and looked down and my wideband was reading 14.7/14.6/14.5 and only those readings. Usually I'm around 13.5 bouncing up and down .5 or more while on the gas pedal.
Got to work, looked under the car...both o2 sensors are still there and intact. No crack in my exhaust, cat or welds from header to cat.
So WTF can cause this. please help and post up guys. Thanks in advance!
MOD--please move this if more NA related, and will help solve this problem faster....thanks
Rob--