the Rat is a bit lame. the Buzz Boar is just bizarre (like the Pogo is), the Coastal Defender is just strange. it's a towed artillery unit, but it's just armed with two rockets and a radar dish...
i can't even figure out what the idea is with the Road Toad. 'battlefield recovery vehicle' clearly implies some kind of tow truck, but it just looks so strange with no cab, and that huge gun on it...
most pointless/stupid vehicle must surely go to the MANTA though? a frickin' windsurfing board?!