Originally Posted by
MFauli
As for the time puzzle... assuming there´s no calculation going on, and there wasn´t a hint during the trip/arrival (which, tbh, some of the others should have been able to notice as well), I´d also guess that we´ll see a flashback which explains how Mutta has a very precise inner clock. Maybe he and his brother used to train their inner clock, because they knew astronauts needed that skill or whatever.
Oh, wait, one other guess: There´s another "skill" that likely only Mutta possesses. He was working for a car manufacturer, inventing new cars and stuff, so he knows this area well, right? Maybe he simply noticed "ok, I know these kind of bus-models. With a full tank, they can go for this long, and the bus driver never stopped for a refill." Something like that.