I just had the best/worst game of White Water I've ever had.
I got to Wet Willy's, completed the whirlpool awards, and was at class six river on ball two, possibly with an extra ball lit (I had several). Suddenly, the VUK to the upper playfield starts sounding and kicking quite a bit. The game was obviously confused. I continued to play for a while, but the game was giving me phantom multiballs, kicking two balls into the shooter lane, and clearly having a lot of problems. On ball three, I kept making lock shots, but the game kept kicking balls out to the upper playfield, making it impossible to lock more than one. So... I didn't. I couldn't. Final score, 900+ million, but no Vacation Jackpot.
I lifted the playfield after the game, and a wire had broken off the center ball lock opto. I soldered it back on immediately and was back in action, but that one hurt.