Bring it on!

Tesla has hidden a new Easter Egg for the P100D versions of the Model S and X. Holding the Ludicrous button for five seconds will activate Ludicrous+ and make acceleration from 0 to 100 kph 0.1 seconds faster. But you have time to change your mind, as the car will first make decide between “no, I want my mommy” and “yes, bring it on!”
teslarati.com, autoblog.com, youtube.com (demonstration of Ludicrous+ mode)