Thats ok. If they think theres a problem developing they will terminate the test asap. So lets say you are peeping and creeping out of a closed junction.
However your observations are not good. The examiner with dual controls may well wait until you start to move off in front of the big scary bus and use the dual control brake to stop you. You have the chance to at least look again and spot the bus and not go. the examine will wait as long as is safe before taking action.
Equally if you have no duals they will tell you to stop if you dont look like you are taking good observations a lot sooner then in the above situation by which time if you are already moving off it may be to late.
Does that make sense?
OK, but if they have pressed the brake then they have allready decided that there is a serious fault with your driving and thus failed anyway..
Its only a fault if you move off etc.

