I have no idea if this is supposed to be intentional but if Vixen were to use a super move (or special*) while someone has enough burn (stacks?*) and heal while at max health (or somewhat near max) they would be able to go over their health limit and have 9500 or 10500 health from what I have seen (It can go over but at that point its impractical unless you are in a lobby with low dmg scaling*)

Edit = (*)