Centre stands....for better or worse.

[clayt74]

I can see how it can happen...... The centre stand is designed as a lever,  so that the working force should be from the leg into the stand and the arms only guide the bike up.. . . . . If you do not exert enough force on the stand and try to pull the bike up with your arms, then it becomes unstable and the arm with furthest reach will cause more leverage and likely result in the bike pulling away from you!