Sadly, I killed three Kerbals yesterday, playing Kerbal Space Program. They were to carry the Turquoise, a small space station, into low orbit, about 100 kilometers. Unfortunately, I had not adequately secured the station within its fairing, and it broke apart on the launch pad, igniting a booster and causing a massive explosion.
I always add features to modules holding live Kerbals, that allow me to press an abort button (<Delete> key) that detaches the module from the rest of the rocket and fires small solid fueled rockets to lift it away. However, yesterday I had neglected to have the fairing deployed with an abort, trapping the Kerbal’ module while trying to make its escape.
Like most of my mishaps, I blame my clinically diagnosed ADHD.