Regardless of different type characteristics, the main sympton that must be recognised is always, the beginnings of a very unpalatable sinking feeling in the pit of the stomach.
The student that grasps the mettle at that point and demonstrates effective recovery is on a winner.
Those who gravitate, (ahem) to the feelings, being a tightening of a lower muscle in the body form will inevitably be sh@t on from a great height.