Played some Mahjong last night with @minimink and I kiiiiinda get it.
Though I didn't fully realize at the time that I needed to make specific hands and not just have a hand with all sets and runs and tried to go out on a hand that...had no valid win condition.
So it was the equivalent of me playing Poker and being like "READ EM AND WEEP FUCKERS!" and my hand is like a 2, a 4, a 7, a queen and my drivers license somehow. XD