I was taking a taxi home once, and as we turned on to my street, I saw someone lying on the ground, right on the curb, plain as day on a not-very wide suburban street. The taxi driver didn’t see anything until I pointed the person out to them. Lots of people miss some very obvious things that are right in front of them, if they’re focussed on something else.
In this case, I was also coming home from the pub, and so was a little bit drunk, too, so it’s even worse that I saw it, and the driver didn’t.