^ Yeah I had to figure it out by myself as well back then, it was one of those 'hard' flip tricks no one in my hometown was doing (there was this gap of many years where this one and switch/nollie flip used to completely elude my local community for some reason, I guess because Luy-Pa had moved out and taken the wisdom with him) and at the time, I had no Internet so besides sequences in mags I had zero pointers. I especially remember first trying and realizing that thinking 'varial flip but harder' really wan't going to work and so I had to focus on the 360 shove first and foremost, and then as I learned how to form it I taught myself to stomp it with the naive visualization I described above.
For those struggling with figuring out how the flip should feel like, it's really like an upward motion (which is why I make so many ollie comparisons), basically picture the start of an ollie impossible except your front foot is the axis instead of the back foot and so with the right timing, you only need to suck that leg up and flick that toe from the grip tape underneath to get the flip going, hence why everyone says it feels completely different from a straight kickflip. Of course in reality it doesn't look like this but maybe it's good mental gymnastics and that also explains how people do 360 double flips, by focusing on the 'impossible' part a bit more so that the board sticks to the front foot harder pre pop and then the flip is exponentially more explosive (and funnily enough, those also feel like you're flicking through the board a lot more than normal 360 flips). There's one 'skate science' vulgarization video with a woman interviewing Mullen on YouTube that I ran into the other day that happened to explain this kind of principles quite well, for the curious and the bored.