Jake's been talking a lot of Lincoln lately. First with Conan, "the Abe Lincoln of talk show hosts" and warning him not to go to the show, then he's talked about Source Coding back to Abe for the last 8 minutes.
So what caused all this Lincoln thinking?
Maybe this fella? Or more likely the one who snapped it.
And there's always more coding:
How Many Times Does Jake Explode in Source Code? (and 24 Other Urgent Questions)
How Jake Wooed Duncan Jones to Direct 'Source Code'
The 'Bean' could be metaphor for 'Source Code'