So on my return from Stavanger I arrive at Oslo Airport, get my luggage and find that one bus just has left, and my next options for getting home are either express train + metro, the train leaving 8 minutes later - or wait 12 minutes more and get a bus. Eager to minimize the walking distance with extra luggage, I decide on the bus. And lo and behold, there are now ticket machines inside the arrivals hall, allowing me to buy a bus ticket right away instead of doing it on the bus. Yay, efficiency!
I go outside. It is 17:25 and the bus is supposed to leave at 17:30. It is not yet there. OK, so it has been snowing and traffic is slow, it will probably be there soon.
20 minutes later, still no bus. Other buses have come and left, but the one I have a ticket for is nowhere to be seen. The screen tells the next departure on that line is 18:10. I realize that at 17:50, another bus will depart - the one that passes just by where I live, and that I had dismissed because it was 20 minutes later than the other one.
Sod it, sod my pre-bought ticket for the first bus, I took the other one. Hope my project manager shows understanding so I can get the 180 NOK that I spent on a non-used bus ticket reimbursed.