Oopty is one of my all time favorite 8 on 8 flag football plays, and works extremely well in long distance situations. Upon sending  in motion, most teams will try and employ a zone defense, typically with 1 safety over the top, and 2 in the short zone with one of them taking away the inside short zone. If you see one single safety, the play is almost guaranteed to work.
At the snap, the quarterback immediately takes off to the right while the center and  attempt to block the rushers giving the QB a bit of time. The post from  should clear out the safety while the curl from  holds the outside corner. When  hits the sideline on his out and up, there’s typically a big window there. The post can easily turn into a post-stop or post-dig depending on the coverage over top.
When this flag football play works, it works big and is a great play for long distance situations where you know the defense will most certainly be running a zone of some sort.