At McLarens, Zoey dares Marshall to send a picture of his junk to an anonymous person. Zoey calls for everyone to shout out random numbers to which "The Blitz" Jorge Garcia responds with 4 8 15 16 23 42, which were the numbers that Jorge Garcia's character, Hurley, discovers on Lost (2004).
When Steve "The Blitz" Henry describes being cursed by being the Blitz, he compares it to "being stuck on an island for ages." Jorge Garcia is most famous for his role on Lost (2004).
The method by which the curse of the 'Blitz' is passed from one person to another (a trail of mist going to and from the mouth) is a visual in-joke to the Buffy episode Hush (1999) where people magically lose their voices in an identical manner. In that episode of Buffy, the villains were called the Gentlemen, which is a catch phrase in this episode of HIMYM.
The character of "Matt Blitz" makes an appearance earlier in the show in the episode 'The Playbook'.
The character name of the original Blitz is Matt Blitz. Matthew Blitz is one of the production staff for the show.