Fuji,
Suspect slow refers to an emergency break, rather than an academic steep turn, where the instructor will clear the airspace (mainly to the right, assuming the stude is sufficiently competent) BEFORE calling a simulated emergency avoidance manoevre. Were the student to delay the turn to lookout in a real situation it could easily cost him/her his/her life, so reliance on the 'big sky' theory kicks in.
F