Chris Messer was driving to work about 9:50 a.m. when he was on the flyover exiting MoPac Boulevard (Loop 1) to northbound U.S. 183 when he saw a small, single-engine yellow plane in his peripheral vision.

The plane is described as onlookers as a “Piper Cherokee.” Experts are trying to determine how such as small plane could hold enough fuel to cause this big of an explosion. A witness saw the blue and white plane, flying very low, barely skimming the road going extremely fast, as though it were on full blast. He said it hit right dead center of where the huge gaping hole is now. He said the explosion was maybe 50 feet wide.