Been doing some experiments in training mode and noticed that at a certain point when an opponent hits the ground they're forced to turn around before they can jump.
This is the vulnerable frame:
There are a couple situations where I've seen it happen (if the opponent uses the recovery roll):
If Duo Lon uses Rekkas then uses another Rekka after he's teleported to the other side, the opponent will roll into him and will have this vulnerable frame while turning around.
With Vice if you use a point blank sweep then use her C DP grab afterwards (not cancelled) she'll hit the grab on the other side of the opponent.
The picture with Clark is the frame where the opponent lands after jumping over them, as far as I can see this is the only frame where it will work.
This is the vulnerable frame:
There are a couple situations where I've seen it happen (if the opponent uses the recovery roll):
If Duo Lon uses Rekkas then uses another Rekka after he's teleported to the other side, the opponent will roll into him and will have this vulnerable frame while turning around.
With Vice if you use a point blank sweep then use her C DP grab afterwards (not cancelled) she'll hit the grab on the other side of the opponent.
The picture with Clark is the frame where the opponent lands after jumping over them, as far as I can see this is the only frame where it will work.