Twinning
It makes a lot of sense when you see people sleeping on public transport considering that they are tired from the commute to and from work. Some people are lucky enough to find a comfortable sleeping position, but if you aren’t careful something might happen in the universe that may cause some sort of cosmic cloning thing.
Surely there is some sort of an explanation for this because there is no way that two people dressed the same would be sitting behind one another, asleep on public transport. That would be way too coincidental… The only other person in view doesn’t seem to think this is strange, so maybe it isn’t?