I still remember where I was sitting the first time I played a slot machine. We had just walked into the casino with lights and sounds everywhere. We walked up to a machine and were trying to figure out where to put the money. Then we saw we had to get a ticket to feed in.
We found the machine to get a $10 ticket and were confounded by the “lines” These are buttons usually at the bottom of the machine or sometimes on the screen that let you pick which 5 items in a row you want to play. You look at the game and think, “OK, three rows, so three lines, right?” Nope, there are 20 lines!