Often hilarious:
Me: There are already more people signed up for yuletide than there were last year. 1634!
thingswithwings: Wow, that's more years than passed between the birth of Jesus Christ and the birth of Shakespeare!
Me: ...
thingswithwings: What? It's true!
Me: There are already more people signed up for yuletide than there were last year. 1634!
Me: ...