Wow, the picture shows this as being in a museum, so it is actually real? Crazy!
I couldn't resist and had to look it up, found the story on it here:
https://secure.wikimedia.org/wikipedia/en/wiki/Vespa_150_TAP<snip>
The Vespa 150 TAP is an Italian Vespa scooter modified to transport a M20 75 mm recoilless rifle, which was used in the 1950s by the French Airborne Forces (Troupes aéroportées, or TAP). It was produced by Ateliers de Construction de Motocycles et Automobiles (ACMA), a licensed assembler of Vespas in France, in 1956 and 1959.
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The scooters would be parachute-dropped in pairs, accompanied by a two-man team. The gun was carried on one scooter, while the ammunition was loaded on the other. Due to the lack of any kind of aiming devices the recoiless rifle was never designed to be fired from the scooter, the gun was mounted on a tripod which was also carried by the scooter, before being fired.
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