Carl's last name is revealed to be MacLaren.
In the toilet, Robin writes: "Dear Marshall, I know this is a strange way to apologize but I'm sorry I let Carl name your drink after me. Why didn't I say something? Gosh, I guess that goes back to my childhood. Did you know that for the first two years of my life my dad treated me like a cat? Seriously, I wasn't permitted on the furniture, I had to bathe myself, and I was only allowed to poop in a box. Ironic that this all comes out in a bathroom. A place that for so long I yearned to be. This tiled prison that eluded my saddened grasp was a haven. The unreachable. When I finally did demand a bathroom visit, my dad applauded my moxie. And that's the only time my father ever said he was proud of me. Maybe that's why I stole credit for your drink. Maybe that's why I needed to pour my heart out like this. Or, maybe I wrote this so you'd be in here long enough for a lady to walk in, causing you to freak out and hide in the stall. GOTCHA!! love, Robin (creator of the Robin Scherbatsky)"
The Robin Scherbatsky consists of coconut rum, peach schnapps, vanilla vodka, strawberry creme liqueur, cranberry juice, sugar and maraschino cherries.
Marshall describes Robin's apparent credit-grabbing of his drink idea as "Zuckerberging," referring to the controversy between Mark Zuckerberg and the Winklevoss twins over who originally had the idea for Facebook.
The song that Barney and Ted are singing is "The Longest Time" by Billy Joel.