05/31/2011 09:44 am ET Updated Dec 06, 2017

Mika Brzezinski Hits Joe Scarborough In The Arm Over Horse Herpes Comment (VIDEO)

Joe Scarborough's salty remark about an outbreak of horse herpes caused Mika Brzezinski to hit him in the arm on Tuesday's "Morning Joe."

The horse herpes story has delighted several MSNBC hosts since it first broke last week. Apparently, an outbreak of herpes caused a rodeo in Utah to mandate that its participants ride stick ponies instead of the real thing. Rachel Maddow was so taken with the story that she led her Friday show with it.

The story caused Brzezinski to double over with laughter for about a minute. Scarborough fared little better.

"Wouldn't you actually have to have sex with the horse to get the herpes?" he said. Brzezinski then hit him in the arm.

"What is wrong with you?!" Brzezinski said. "The story speaks for itself. It's funny, it doesn't need you! What a stupid comment!"

"That was a question that needed to be asked," Scarborough said.