T-34: Was on a navigation ride (clock-map-ground), and left my map up in the WX shop before stepping, and realized it as we were about to taxi out for takeoff. Somehow I was able to BS my way through the ride and not hook...
UH-1: performing first auto in a couple months (first ride after instruments leading into remotes), and I definitely touched down on the tail stinger, 30 degrees off lane heading, and somehow pivoted to the lane before coming down on the skids. After we came to a stop and rolled the throttle back up, the IP (the DO) turned to me and said, "Well...let's try that again." Not sure how I didn't hook, but the write-up said something to the effect of "minor deviations during first straight-ahead auto, corrected by the end of the sortie."
HH-60: C-3 or C-4, whichever was the "auto ride" during IQT, I was flying with the SQ/CC, got slow on the descent of an auto and got the "Go Around" call. What did I do? Pulled an armpit of collective and drooped the SHIT out of the rotor. I somehow remember having the time to turn and look at the FE as we were falling out of the sky with the rotor horn blaring, and his mouth was a big O, and eventually the engines caught up and we flew out of it. The SQ/CC was sitting there calmly the entire time and didn't touch the controls, and once we got back to the downwind he chuckled and asked me what I learned. 1: Don't get slow in an auto 2: don't pull in an armpit of collective on a go around, the engines need time to respond 3: Underfreq protection works. I'm not sure how the main gens didn't kick offline, that's how much I drooped the rotor.