A spin down the famous slide at American Family Field on Wednesday ended up in a trip to the emergency room for Dodgers reporter David Vassegh ... who ended up breaking several bones in his body on the ride at the Brewers' ballpark.

The mishap happened just before L.A. took on Milwaukee at the stadium in Wisconsin.

Vassegh was gunnin' to check an item off his bucket list by finally going down Bernie's Chalet in center field -- but things went terribly wrong for the journalist when he came to a stop on the ride.

Video of Vassegh's slide shows he didn't finish feetfirst -- and ended up crashing into the wall with his arm and back exposed. You can see in the footage, Vassegh was in a world of pain immediately.

Turns out, he ended up breaking his arm and fracturing six ribs in the fall. But, somehow, the dude made it back to the field in a cast to get his job done!!

Dodgers announcers Joe Davis and Nomar Garciaparra laughed their asses off at the blunder -- and, to his credit, Vassegh was a good sport about it all on TV.

The guys that Vassegh covers, meanwhile, were impressed with his toughness ... with catcher Austin Barnes saying after their 2-1 win that they got the dub for the injured reporter.

"We all rallied today for you," the Dodger said.

No word if Vassegh will have to miss any further time from here to properly recover -- but get well soon!