I misclicked while choosing my skin and took one with M, then realized it stood for Mick as a subconscious tribute to our missing flight leader. I then proceeded to make a fool of myself while taxiing, trying to not lose Friar and landing. It's a good thing it wasn't my usual plane, nobody has to know!
Edit: and screwed up engine start too, luckily they restarted. The inexcusable part is that I was completely sober.
On a more serious note, I think I understand why people couldn't restart engines after a botched startup. When you press the engine start key after a failed start, it initiates a shutdown procedure, the little HUD messages tell you which switches your pilot is flipping and he's basically doing the startup in reverse order, turning magnetos, and pumps and whatnot off.
I think this shutdown procedure needs to be left alone until it's completed, before the engine is started up again. I suspect people pressed the engine start key before the shutdown procedure was completed and thus the engine on procedure started before the engine off procedure finished, confusing the game and screwing up the order in which the systems are turned on. Not sure if this was already known, but just something I noticed yesterday. If your engine doesn't start, wait until you get no more messages, press the engine start key once, and wait for everything to be turned off. Then adjust the mixture or what ever you screwed up the first time, press engine on again, and it should work.
Don't forget to select the engine that's the problem, as in my case the right engine was running well as I adjusted the mixture before it spooled up. I think if you have one engine running and the other off, pressing the start engine key would turn off the good one and start the one that's off (haven't tested this, maybe I will today just to be sure).