I believe the CSC (two sticks down and in) may not work anymore for motor cut off while flying. I think you have to pull left stick down and in while you push the RTH button (correct me if I'm wrong) to stop the craft while flying. So if you're moving the craft around after you grab it, the craft may think it's flying and not shut off. The same may apply when using the traditional turn-off method, which is holding down the left stick for 3-4 seconds like ALOK... stated.
The other thing to be aware of, if you are using the rubber band stick stiffeners, those will hinder your ability to do a CSC to start and stop motors because full down and in is not restricted in the corners, it hits the plastic ring that holds the rubber bands. You have to grind the plastic a little to allow full stick deflection in the corner areas..
View attachment 67612
There is a specific hand catch process I use for safety that I'll share:
1. Fly the craft about 10ft away from me about 7ft high (so the blades are above my head, but legs easy to grab)
2. Let the craft hover for at least 5 seconds as I walk toward it with my fingers OFF the RC sticks.
3. I watch the craft carefully for movement as I slow walk toward the craft.
4. If the craft is relatively stable for several seconds I slowly approach it from underneath and grab one of the vertical legs firmly with my RIGHT hand.
5. I hold the craft in the exact spot I grabbed it while I pull the RC left stick full down with my LEFT hand for 3-4 seconds until motors turn off.
6. When motors power down, then I bring the craft down from 7' up.
7. I set the RC down and turn off the craft battery, then turn off the RC power. Done.
With a little practice the ONE HANDED left stick full down can be done without an RC harness around the neck. I prefer NOT to use a harness while flying, hence I rarely hand launch.
I see a lot of people do things that aren't safe when hand catching, they get too confident IMO. One of the worst is flying the craft to your hand because you're too lazy to walk over to a craft hovering, or just plain showing off to a crowd. Sooner or later that will catch up with you, no matter how good a pilot you are. I think grabbing a craft while your fingers on the stick is asking for trouble, but that's just me.