Cobie Smulders, who plays Robin in the CBS sitcom, revealed that comedy show's writers created a story with constant rhyming by the characters, reported Huffington Post.
"We just shot an episode where the entire thing is in rhyme. And it was so much fun. It's like every second line is a rhyme. It varies; you gotta watch it!" Smulders said.
"The writers just nailed it. It's so fun and they just made it so funny, but so lyrical at the same time," she added.
Smulders did not say when the said episode will be aired.