Anyone remember the discussion on the "flippy" aka "spikestun" animation we had earlier on this thread? Where I said it's caused by being hit by a spike? Couple things happened to me since:
1. I got the flippy animation with a low Falcon stomp.
2. I got hit by Zelda's dtilt.
Neither of those moves is a spike, so I did some experimenting and found most or all the moves that can result in the flippy animation (only tested spikes and meteor smashes), as well as instructions on how to get them so others can verify (most are pretty simple). Didn't bother to test CCing, since only spikes can interrupt CC before the the % is high enough to get a knockdown. Also didn't bother to figure out % ranges, so I'm just listing %'s where I got it to work pretty consistently. I used Training Mode, Yoshi's Story, vs. Captain Falcon for all these tests.
EDIT: Through experiments with the slanted fin on Corneria, I believe the primary requirements for the flippy animation are:
1) The knockback is the correct power (affected by %, move, and sweetspot vs. sourspot).
2) The victim does not leave the ground (affected by knockback trajectory and ground angle).
Hitting the lower hitboxes of the character seems to help, but is not always necessary. I also believe that the ground flippy animation is somehow related to the aerial flippy animation, although I have not proven this (and probably won't).
Moral of the Story: The flippy animation isn't anything special. Spikes and Meteor Smashes produce it more often only because down is the direction the ground is usually in.
[COLLAPSE="If Anyone Cares"]Zelda: Dtilt (40%), Low Dair (45%)
Falco: Low dair (40%)
Marth: Low dair (0%)
Falcon: Low dair (0%)
Samus: Low dair (0%)
DK: Low dair (0%, facing backwards)
Mewtwo: Low dair (20%, facing backwards)
Kirby: High dair (40%, only connect with 1~3 hits, pretty tough to line up)
Roy: Dair (0%, Falcon on side plat, full jump immediate dair from sloped ground)
Yoshi: Dair (90%, Falcon on side plat, short hop from ground), Fair (0%, Falcon on side plat, short hop from ground)
Luigi: Dair (10%, Falcon on top plat, full jump from ground)
Mario: Fair (10%, Falcon on top plat, short hop from side plat)
G&W: Dair (20%, Falcon on side plat and have him roll towards center stage a couple times, line up G%W under Falcon's back foot and full hop immediate dair, tricky to line up)
Puff: Dair (previously discussed), Dsmash (30%)
More which use Corneria's fin slant:
(All: Place Falcon on the fin, just a little higher than where the fin meets ground)
Peach: Nair (15%)
Falco: Dsmash (15%), Nair (25%)
Fox: Dsmash (15%)
(Probably tons more)
Could not get:
Peach: Dtilt (Too powerful, knocks Falcon airborne at 0%)
DK: Fair (Too powerful, knocks Falcon airborne at 0%), Forward B (Pushes opponent into ground)
Ganondorf: Dair (Too powerful, knocks Falcon airborne at 0%), Reverse uair (Tested up until it started knocking Falcon down), Down B (Too powerful, difficult to line up on the ground)
Fox: Dair (Tested up to about 200%, just never happened)
Ness: Dair (Too powerful, knocks Falcon airborne at 0%), Dtilt (Never happened)
IC's: Fair (Too powerful, knocks Falcon airborne at 0%)
Link: Dtilt (Too powerful, knocks Falcon airborne at 0%)
YLink: Dtilt (Too powerful, knocks Falcon airborne at 0%), Dair spike (Too powerful)
Pikachu: Uair (Too powerful, knocks Falcon off of plats, too difficult to line up elsewhere)
Marth: Dtilt (Never happened), Third hit of Forward B aimed downward (Couldn't line it up right, has shorter range than first two hits)
Roy: Dtilt (Too powerful, knocks Falcon airborne at 0%), Usmash (Either too powerful, or couldn't line it up right)[/COLLAPSE]