In Awakening: All the references to today's technology, such as the security questions for logging into the mirror.
Siris's first thing that he writes in the journal his mother gave him to record his thoughts on his journey. For reference, fenweed soup is a food he ate a lot that supposedly tastes like dishwater.
I hate fenweed soup.
Isaline's trouble with the Pangean language causes her to make a few malapropisms. One of these turns out to be thinking that the plural for "pen" will be "penis". Then comes Siris's Spit Take. Then Isa wishes at the end of the section that she'd made that mistake on purpose...
Any one of the messages you get when you try to equip a Solar Weapon with an Elemental Gem.
AWESOMENESS: Are you ready for the most face meltingly awesome weapon of all time?