'How I Met Your Mother' preview: Barney reacts to Robin's news

When Robin dropped the bombshell at the end of "How I Met Your Mother's" latest Thanksgiving episode [SPOILER ALERT] that she was pregnant, we didn't get a chance to hear Barney's reaction.

Now, thanks to this preview clip, we'll pick up right where we left off and see exactly how Barney takes the news. Unsurprisingly, Barney is his usual inappropriate self, and reacts to the very serious revelation with uncouth jokes about Robin's boobs. (Never change, Barney.)

After Barney ends up unconscious twice, Robin finds herself losing her grip. Hey, you would be too if there was a possibility that Barney Stinson could be the father of your child. Yikes.

Check out the clip below: