You, like most Americans, probably plan to run for president. You have plenty of time, theoretically; the general election is still 22 months away and even if you plan to seek the nomination of one of the major parties, those don't kick off until January.
Rearing is a common measure of activity and exploratory behavior used in the open field and sometimes in certain mazes. Nothing else. But I agree it could be related to very specific behaviors. I like the idea of escape.
Meaning bring into being, bring up (as a child) is recorded from early 15c.; that of raise up on the hind legs is first recorded late 14c. Related: Reared; rearing. Online Etymology Dictionary, Â© 2010 Douglas Harper Cite This Source