Question 416: tRick or treat

THis is from an extremely popular internet meme, im sure each one of us has been (pic2ed) many times.

Just id:
1) Character in pic 1
2) The blank in pic 2



pic 1


pic 2

Question 415: Grin and Beer it

In the beginning of the Obama administration, an incident occurred between a police officer X and a professor Y.
This caused Obama to call them both over for a beer at the white house
This is an XKCD parody of the event.

Question:
1) ID X and Y
2) What happened ( god is in the details,lol)

Question 414: At Ur Beck and Call

Yes, this post is most unlike me.
Science!
We've had enough of this in school, yeah?
Anyway,

What is this?
The title should give you a clue.