Supermoto always seemed strange to me at first.
I was road racing at the time and on practice days I would see these guys on motocross bikes with slicks and thing... "why don't they just get a roadbike?"
I didn't know that they would go offroad for a bit and have jumps and a bit of dirt-track. Then back into corners on the asphalt. Looks pretty cool afterall.
It also reminds me of novelty car races they used to have on wide world of sports where rally drivers would compete against road drivers in a half road half offroad circuit.
Here's a WR450 Supermoto page: