During my few days off last week I went back to my old school and got my MEI. I am now a holder of the CFI trifecta!! Checkride wasn't that bad compare to the multitude of other rides I've done. Ground was aerodynamic principles and some basic Twinkie systems. The flight was a nonevent. Did a engine failure on the takeoff roll, a engine failure in the climb out, and an engine failure at altitude. Did a few Vmc demos and taught a steep turn and some stalls. Returned to the field for a single engine landing and a another few quick trips around the pattern. The most challenge question of the day was "how do you know an engine has failed?" I drove straight into weeds during the climb out. After a few minutes trying to reinvent the wheel the DPE reached over and killed an engine. As I reacted he asked "so how did you know it failed? I bet you noticed via the Ailerons?" He laughed as I said Yes. He said teach your students to notice a dead engine via ailerons before the rudder as it's easier to notice.