Top Reddit comment:

Whoever is playing me definitely has a free account.

3400+ Reddit comments:

https://reddit.com/r/Futurology/comments/4m688m/elon_musk_believes_we_are_probably_characters_in/

:) 

"This shit is going to be on shower thoughts within the hour."

It will probably be in my shower thoughts the next time I shower. 

Are we in a computer simulation right now?

http://pandawhale.com/post/6126/whoa-dude-are-we-inside-a-computer-right-now

Woah. Now I don't know what we are. 

As a cartoon:

http://pandawhale.com/post/72372/remember-when-elon-musk-said-were-living-in-a-computer-simulation-this-cartoon-explains