How lazy am I? The keyboard was a little too far away from me, but the mouse was at hand. I wanted to look up Ghostbusters on IMDB. Again, keyboard, not within reach. So instead of actually getting up, I brainstormed. I went to the Coming Soon section on the site, found Street Kings. Street Kings features Hugh Laurie of House fame, which now features Kal Penn, who stars in Harold and Kumar which had a cameo by Neil Patrick Harris who works with Alyson Hannigan on How I Met Your Mother whose first movie was My Stepmother is an Alien which starred Dan Aykroyd... who played Dr Ray Stantz in.... GHOSTBUSTERS! No keyboard required.
EDIT: Yes, I realize in hindsight that Kal Penn was in the Buffy episode "Beer Bad". The reason I did not recall this fact at first? BECAUSE THE EPISODE WAS BEER BAD!