:shocker: Don't run the bike while its on the stand!
When you put the bike on a single-swingarm stand, the pin slides into the hollow axle. If you rotate that axle, the inside of that axle is just sliding on that pin. Unless you keep that stand pin well-greased, it isn't real easy to rotate the tire by hand, much less have the engine rotate the tire. You're lucky the bike didn't slide right off the stand while running.
When you put the bike on a single-swingarm stand, the pin slides into the hollow axle. If you rotate that axle, the inside of that axle is just sliding on that pin. Unless you keep that stand pin well-greased, it isn't real easy to rotate the tire by hand, much less have the engine rotate the tire. You're lucky the bike didn't slide right off the stand while running.