Mostl likely what you did, play a little and move on.
When I want fun I go to a casino....Nothing like a cock, slot and a handy!!
Yea, I would have just said "Wow, congratulations!" and kept on playing.
Back in the 90's, my friend and I had taken the shuttle to the Gold Coast from the Strip, specifically to sign up, get free play and play their massive amount of VP machines.
We were just about to sit down and start playing when this lady comes up to us and states "Ya may as well turn around and go home, these machines aint payin' today!" Oh, okay! Ha Ha!
I would probably say, "Good, I hope I do too," or "Nice -- you warmed it up for me," and leave it at that.
If I win something good on a slot, I hit the button one more time to get the win off so people will not know something won off it and then I change machines. Sometimes I leave the win on if the credits in the machine is at 200.21 for example, so that I can easily get cash for it without all those 1's and extra change. I have also seen machines win back to back to back before with one person on, then another person, then another. A machine can stay hot for a long time or a machine can stay cold for a long time before hitting. One thing I do not like is when someone loses just about all their credits and leaves credits in the machine. I consider that credit bad luck. I cash it out and set it aside so the machine knows its a new player.
What I hate is when you sit down at a machine and the person next to you says "I just got off that machine, it's not paying anything" and then you get something big and they tell you "you know, part of that is mine, I put a lot of money in that machine and it took it all", this happens more than you think. I got so pissed one time because I had been on a losing streak and this was my first really good hit and it just took the shine right off it. I'm not a very confrontational person unless I get really riled up, but this time was an exception. I thanked her for her contribution to my new refrigerator and asked her what other machines she had dumped money in to so I could go and play them and try my luck. She was not receptive to my sarcasm and stormed off. Win/win for me; got to play a hot machine and got to do it in peace.