My laptop’s trackpad is not great both in terms of responsiveness (somehow over- and undersensitive) and placement, which is to say when I rest my left hand on the home row for typing or on wasd for video games I often accidentally input a left click by tapping on the pad with my lower palm/thumb. I could turn the pad off, make it less sensitive, or disable tap-to-click, but it does come in handy when I want to pinch/expand to zoom in on a web page (to better read posts here, for instance), so I often leave it on, and it is unbearable to use when any less sensitive than it is when configured this way.
All that is to say, playing shooters I will often fire without meaning to. Particularly funny playing Black Mesa just now, imagining Gordon Freeman struggling with hair triggers in the HEV suit. “Yes, right away fellow scientest, I will go find the Lambda TeamOOPS! Nope didn’t mean to shotgun blast the door”