It actually has to be at least a 360. If you spin say even 270 degrees, but unwind back the way you came. There is no yellow. There is no rule about straight up and down either. Technically it was a backflip with a full twist. A case can be made for the full twist being a 360 in the vertical dimension. I switched to Dirt Vision and in the Outlaw race someone did a 360 and they threw the yellow, but he got his spot back because he didn’t stop, which makes way more sense.