What will you tell your grandchildren about the strangest double play in postseason history? Here's everything you need to know about it.

Sal Frelick was still mad after a rare 8-6-2 Brewers double play vs. the Dodgers in the NLCS despite helping shift momentum Milwaukee’s way.

With Max Muncy at the plate for the Dodgers with the bases loaded and one out, he drove a 92 mph cutter to straight away center field. Sal Frelick made a leaping attempt to rob the would-be grand slam. And he did just enough, making contact with the ball and then catching it off the bounce from the wall.

You have to see this unreal grand slam that somehow turned into a double play costing the Dodgers in Game 1 of the NLCS against the Milwaukee Brewers.

The ball hitting the fence made the play live, which caused chaos on the base paths. Frelick fired a throw in to shortstop Joey Ortiz who relayed the ball home for a force out as the L.A. runners retreated back to their original bases because they weren't sure whether it was a catch or not.

Max Muncy hit a ball off the wall with the bases loaded. But instead of Dodgers runs, it was a stunning Brewers double play amid confusion in NLCS Game 1.