I'm playing Street Hoop on my mame cabinet - with Chicago team of course

. Trying to win the championship on one "quarter".
While playing my two year old gets on the player two controls and starts whackin' buttons. No problem, cuz there are no extra "credits". And he can't pause or exit game without using "shift" button. So I let him act like he's playing too. If he hits the credit button, I'll take him off the chair.
I get to the finals and jump out to a big lead, so I thinks its money in the bag. Well just before halftime I see the "Player 2 is joining in message" (or something like that). WTF!!!
To my horror, the game was set to freeplay so all it took was him hitting 2p and he was in. So, after gathering myself, I conclude that I'll play the two player game out, have the lead at half, and then continue on with my single player game. Noting that I am still on same credit.
Well what do you think happens? Yup, the AI jumps on me and takes a halftime lead, which would force me to use another credit to continue.
I was so distraught that I simply exited the game.
(Damn that was a long story),
--JamIt