The toilet makes no sense

So this guy has to go to the 'toalette' in the train.

There are a few things that make no sense.

1) Why would the toilet have a HATCH on top of it that a man can fit through? WHY? What is the purpose of that hatch, who would design a toilet this way? It's obviously not a normal air vent or anything like that, why would a toilet need a hatch like that to exist on the roof?

2) Why wouldn't the other men KNOW about this hatch? If it's this common that train toilets just have it as a normal thing, surely they would know about it, and make sure this guy can't escape through the roof. They could AT LEAST check the toilet before letting him in there, and why would they give him the LUXURY of privacy??

3) A helicopter is not exactly silent. A helicopter 'hovering' so close to the train, despite the train making its own noise, would be _EXTREMELY_LOUD_ and completely detectable. Everyone on the train should EASILY be able to hear what's going on, and thus, the men should NOT let this man go to the toilet alone, at least they should handcuff him to a railing or something, geez.

This toilet escape could NEVER happen if those guys were even 1% competent.

This whole thing makes NO SENSE.