HAH!!Oh well, these things happen...Sensei, I will do another demonstration. Please lay down on your back.NOPENOPENOPENOPENOPEI might have applied a bit too much strength.Applying pressure to the chest area is a vital part of performing CPR.Here, I will demonstrate on this dummy...Are you paying attention, everyone?It should be done 100 to 120 times per minute.No hesitation. Push as if you were trying to break a rib.