I had a situation very recently where we were torquing a cylinder head with "torque to yield" head bolts. Followed the book, seemed odd at the time the torque was so high, but.......Snapped the first three head bolts at the final torque. Pulled the head, removed the remainders, tried again with new bolts, SNAP!
Torque wrench calibrated in August (Certified), head bolts OEM. Service manual, one serial number out of sequence.
Trust you gut instincts every time.