Offroad as in dirt/trail bikes? Or offroad as in race replicas?
I’d think trail bikes because they’re easier to do stunts on than racing bikes. My first ride on a Bultaco Alpina 350 started with a wheelie and I didn’t even know it till the guy who was helping me out told me what had happened once I came back down the street.
Race replicas. I’ve seen smaller groups in the past, on this same highway, and these boys are exceptionally stupid and wild - speeds in excess of 100 MPH, zipping in and out of regular traffic, doing wheelies for hundreds of yards, etc.