You think that's bad? In all the factories I've worked at, the kind of person you just described makes up half the labour force. You only have to deal with them for 5 minutes, tops.

I had to work with them all flippin' day and try to stop them from injuring themselves because there's a shitload of heavy machinery around, or explain a simple job to them several times, show them several times then watch them do it wrong several times until i found something easier for them to do and i picked up their slack.