I had a freak hit on an Ultimate X Poker 10 play.
Held a pair of 4's.
Hit 4 fours with kicker twice, on the only two lines that had a multiplier from the previous hand (both 4X)

Not the best machine to play I know, but I have a soft spot for it after it got me out of jail a couple of years ago. I'd lost all week and that machine dealt me a straight flush.

I actually got dealt four 6's on it this trip but only had a couple of 2x from the previous hand. A dealt hand like that needs to be preceded by a dealt full house
Theoretical jackpot is good is you were dealt a full house followed by a royal. That would pay $480,000 for a $100 bet !!