I have had too many "oh, I got this" moments..
Bike was really hard to start, and then ran really crap, then pagged out completely... eventually noticed that I hadn't turned the fuel tap on
Went around the block to test my new brakes out and there was a horrible grinding noise and not a lot of braking force- got back home to find one of the new brake pads on the garage floor
Late one afternoon, turned on the headlight and found when I checked it, that only high beam was working. After playing with the headlight switch for a while ... "DING!"- I have two 500's, but I was riding my 550F which has the high/low beam switch on the LEFT side- the right side switch just changes from "park" to "on"
The kill switch occasionally gets me too! John