like Jetmech said a pushout (down elevator) from stable low inverted to vertical or a half outside loop to level upright flight is a difficult manuver to perform without inducing a roll on the stick during the pushout and when this happens the natural response to panic and pull the stick which of course is a big ground contact mistake.

Always try to form the habit of rolling for recovery with a small pushout (down elevator) just before rolling.

John