That’s what we call the dead-cat bounce. The further and faster a stock price falls, the more people think it will go back up and buy in at the new low price, thus at some point there is a short-lived reversal of the decline before it continues as it was. Although much of Tesla’s value recently was from a big jump in November (getting a fancy new oval-shaped office will do that for you), so this is likely as much a correction of that overreaction as it is some protest of or loss of faith in Musk.