A semi flip is a 1/4 kickflip late frontside back foot varial 5/4 underflip.
Here is how I do them, I don't know if it's the best looking method, but it works pretty well and can allow to get them consistent.
Knowing how to double kickflip and to bubble flip may be helpfull.
Animated gif 1
Animated gif 2
Feet placement:
-It's the same feet placement you would use for a double kickflip.
-the back foot is ready to do like it would for a bubble flip.
How to do the trick:
1/ do a quick 1/4 kickflip (not too high) and leave the top of back foot's toes in contact with the griptape.
2/ raise your back foot to do the frontside varial 5/4 underflip (like you would for a bubble flip), try to push the board a bit forward so it stays under you.
3/ land.
Tips:
-try to do a real 1/2 kickflip start, even if it may flip only 1/4, this will help by making the board stick to your back foot toes.
-try many small adjustements in your position and the direction you jump into, this is a matter of precision, it doesn't require a big pop or a high jump.
-sometimes it can help to think about a small double kickflip.
-it may also help to allready put a (very) small amount of fs rotation in your 1/4 kickflip.
Variations:
-the bigspin semi flip which is hard to do regular on flatground but can be done on slopes or fakie.
-it's possible to do 360 semi flips.
Here is how I do them, I don't know if it's the best looking method, but it works pretty well and can allow to get them consistent.
Knowing how to double kickflip and to bubble flip may be helpfull.
Animated gif 1
Animated gif 2
Feet placement:
-It's the same feet placement you would use for a double kickflip.
-the back foot is ready to do like it would for a bubble flip.
How to do the trick:
1/ do a quick 1/4 kickflip (not too high) and leave the top of back foot's toes in contact with the griptape.
2/ raise your back foot to do the frontside varial 5/4 underflip (like you would for a bubble flip), try to push the board a bit forward so it stays under you.
3/ land.
Tips:
-try to do a real 1/2 kickflip start, even if it may flip only 1/4, this will help by making the board stick to your back foot toes.
-try many small adjustements in your position and the direction you jump into, this is a matter of precision, it doesn't require a big pop or a high jump.
-sometimes it can help to think about a small double kickflip.
-it may also help to allready put a (very) small amount of fs rotation in your 1/4 kickflip.
Variations:
-the bigspin semi flip which is hard to do regular on flatground but can be done on slopes or fakie.
-it's possible to do 360 semi flips.