> There is one where you need to look at time, look away and look again. The time will change or be in an impossible format if you're dreaming.

I did a bunch of lucid dreaming when I was younger (seems it was a lot easier then?), and even knowing things like that can end up making sense in the dream, you sometimes end up thinking "Well, it kind of makes sense the time went from 11:00 to 14:00 when I looked away, I did look away for quite a while".

For people who haven't lucid dreamed before, it might sound simple and almost stupid, but a lot harder when you're trying to look at your watch and everything makes sense but also not.