When a college class is moving quickly and you are still recovering from looking at the syllabus and it looks like an immense amount of work.

When you're lost while driving and suddenly realize you're in an area infested with niggers.

The stomach-turning shock that fills your body when you notice that someone who are awkward with (ie a previous hook up, or some one that you are embarrassed to be around) is in the vicinity. An awk shock may lead to a feeling of fear and nervousness, and the act of squealing, running, ducking, or hiding to avoid the awkwardness.

when you watch the new freshman come to your school and are annoyed by their behavior. and then you begin to realize you were actually the same way.

The surge of energy upon catching a glance from someone you like, a thrill leaving you with the desire to chase after the one you saw; also, a song by Squarepusher

when someone has a heart attack of some sort because another person was joking about something serious...when it really wasn't.

The period after a sack tapping, in which an exquisite pain is felt, often leading to a state of nausua and flinching whenever somebody makes a quick movement in your general direction.