So here it is
This is where Keith ousted Giselle from the task... If her head was straighter, the arm was not away from her head... it was not bending either... There could have been other places where her arm was not totally straight... but in this particular instance, Keith gave in to the pressure from Rochelle.
If you compare that picture with this one... Here Rochelle's head is straight... If her head was bent, there would have been no difference