INSTRUCTOR AND STUDENT WENT BUZZING.

Narrative

THE STUDENT WAS FLYING THE ACFT UNTIL THE INCIDENT OCCURRED. AT THAT TIME; I TOOK THE ACFT FROM THE STUDENT. WE BEGAN THE FLT WITH ONE TOUCH AND GO AT GLH ON RWY 36L. AFTER THE TOUCH AND GO; THE STUDENT REQUESTED TO DEPART TO THE W. WE DEPARTED THE AREA AT 1000 FT MSL. ONCE WE WERE W OF THE LEVEE AND E OF THE MISSISSIPPI RIVER; THE STUDENT DSNDED TO AN ALT OF APPROX 25 FT AGL. AT THAT TIME; HE ALSO TURNED TO THE N AND PROCEEDED TO FLY BACK AND FORTH BTWN THE RIVER AND THE LEVEE. THIS WAS FOR PLEASURE. WE WERE SIGHT SEEING. (FOR LACK OF A BETTER DESCRIPTION.) AT APPROX 11-15 NM FROM THE GLH ARPT THE STUDENT NOTICED A TRUCK ON TOP OF THE LEVEE HDG N. HE THEN PROCEEDED TO DSND AND FLY PAST THE TRUCK ON THE E SIDE OF THE LEVEE. AT THAT TIME; THE ACFT TOUCHED TO LEVEE WITH THE MAIN L GEAR; THEN THE NOSEWHEEL WHICH WAS KNOCKED FROM THE ACFT TOUCHED; AND AT THE SAME TIME THE L WING CLIPPED SOME TALL GRASS. THIS OCCURRED IN A MATTER OF SECONDS. I TOOK OVER THE ACFT; LOOKED AT THE INSTS AND CIRCLED BACK AROUND TO SEE THE DAMAGE. THE AIRSPD; INDICATOR WAS READING ZERO AND ALL ENG INSTS WERE 'IN THE GREEN.' WE COULD SEE SOME DEBRIS ON THE GND. I RETURNED TO THE ARPT AND UPON ENTERING DOWNWIND FOR RWY 36L REQUESTED A GEAR CHK. 2 MAINS NO NOSE I MADE AN EMER LNDG ON RWY 09. THERE WAS NO FIRE OR DAMAGE TO THE ENG. NO ONE ON BOARD WAS HURT.