UFC Fight Night: Bigfoot vs. Mir will go down as one of the most improbable events in UFC history. After Ivan Jorge defeated Josh Shockley to open the Fight Pass prelims, not one other betting favorite won. That's 10 straight bouts where the underdog came out on top. Per one source of calculation, the odds on the first 8 underdogs winning their bouts came back at 63,000 to 1. Which is to say that a bet of one dollar would have paid back $63,000 through the first 8 fights alone.

Need... time machine... RT @MMA_predictions: A $100 parlay of the 8 underdogs that won would of won you 6.3 million. pic.twitter.com/0bx9ODyRTh — Shaheen Al-Shatti (@shaunalshatti) February 23, 2015

All of which meant that bookies apparently lost big off the UFC's bizarro betting card. Kevin Bradley, sportsbook manager for Bovada.lv, spoke to ESPN.com after the event, reporting that they lost close to a million dollars off underdog performances down in Porto Alegre, Brazil.

"We had at least a dozen of these bets that paid out $10,000 or more," Bradley said.

...

"We're not getting this money back from the people that won," Bradley said. "The type of bettor that wins these bets throws a small amount of money on all the favorites or all the underdogs to try to get rich. Well, I guess it worked."

Other reports, from ESPN sports business reporter Darren Rovell, show a number of big scores for gamblers:

Massive UFC parlay bet wins from last night continue to roll in pic.twitter.com/u4q6esuXHg (H/T @LongWayToTipp) — Darren Rovell (@darrenrovell) February 23, 2015

As well as a report that some finicky rules saw Oddsmaker.ag bettors get capped off at payouts of $150,000, despite advertising a potential for much, much more.

$5 9-underdog UFC parlay said it would pay $536K, site @oddsmaker told bettor max payout was $150K (H/T @frizzmuney) pic.twitter.com/LcfBHuO0EO — Darren Rovell (@darrenrovell) February 23, 2015

Still, even at 1/4th the price, these losses are a bit of a gut check for an industry that rarely comes up in the red when all is said and done.