I'm a flight instructor. When I teach engine out emergencies in multiengine aircraft one of the challenges is to quickly identify which engine is failing. The most obvious effect of an loss of thrust on one engine is yaw (rotation of the airplane about the vertical axis), pilot's natural reaction is to compensate for the yaw by pushing on the opposite foot pedal (because pedals control the yaw). So one leg is pushing hard on the pedal, the other one is not. Now it's easy to identify the failed engine "DEAD FOOT = DEAD ENGINE" where dead foot is the relaxed one. If the left foot is relaxed then the left engine has lost thrust.
The next thing is establishing so called zero sideslip, which means banking few degrees into the good engine. Similar RITL is "RAISE THE DEAD", meaning the dead engine side should be higher than the good one after establishing the bank.