A woman active in labor with a history of two previous cesarean births is being monitored frequently as she tries to have a vaginal birth. Suddenly the woman grabs the nurse's hand and states, "Something inside me is tearing" The nurse notes her blood pressure is 80/50 mm Hg, pulse rate is 130 bpm and weak, the skin is cool and clammy, and the fetal monitor shows bradycardia. The nurse activates the code team because the nurse suspects the client may be experiencing which complication?