In the early 1970s a Puma was rolled over by a student pilot ground taxying to line up on the disused runway for his first solo takeoff.....
The RAF taught pilots to hold the cyclic into a turn whilst ground taxying to minimise the likelihood of adding to the stats.
It is even easier to upset the applecart if you apply the wrong (left) pedal for lift-off. The aircraft rolls very rapidly to the right as it becomes light on its wheels.
The old Pume has a few other nasties she can also deal out to the unwary pilot...