Missile Serve
From SlimeWiki
I call this one the "Missile Serve" because it feels more like firing a missile than hitting the ball, although it's quite pointless.
You probably shouldn't use this at all. It can be easily answered, and is about the worst show-off serve (no duh).
When you're on fire, you can go backwards and then tip-serve-ishly hit it sometimes and miss it sometimes. This one's more useable, but still not the best on-fire serve. In these replays, the first is a hit, the second a miss.
If you're really lucky, you can do it without being on fire:
While you're on fire, try the throw version. To do that, you have to do a lower "missile".
The "Which-Way":
That's right: one way, then the other. All with one missile. I guess it's a slime-seeker (do slimes emit any heat?)!
The "Which-Way-Up":

