A "bounce" is +5 or +7, and the "bounce" is expected to bounce again and again like a rubber ball, getting lower and lower until it stabilizes near where it started.
It's premature to call this a "bounce." Let's see if it is sustained. Let's see if this is a SHIFT.
-PJ
You’re right. There are few if any “bounces,” surges, like this one in the history of polling over 1 week.