When at the beginning of the movie Monica Zelak is talking to Daniel Bradford, she uses the verb "grok". This comes from 1961 novel "Stranger in a Strange Land" by American writer Robert A. Heinlein as a alien word to mean "to deeply understand".
When, at the beginning of the movie, Christian Doyle receives a phone call, the subtitles say "super cool ringtone" and it is the JourneyQuest (2010) theme.