Emergency parachutes do not require a stable arch, and are not designed to open at those sorts of speeds.
Instead, the instructions for their use is quite simple: As soon as you are clear of the aircraft deploy the 'chute. They are designed to open quickly at low airspeeds. A skydiving rig is designed to open gradually at high airspeeds. Waiting until you have achieved a stable arch and then opening an emergency parachute is likely to cause severe injury.
If you wear a parachute, you should learn the parachute landing fall.
And yes, hang glider pilots do carry an emergency parachute, but we don't cut away from the glider.
He really should have kept more emphasis on KEEPING YOUR KNEES BENT.
Anywho
Also you’re jumping static line from your own plane? Doubt it
How often to you practice holding the handle and making a smooth and strong pull? When are you going to grab the handle? How many seconds from the plane? How long does it take to get unstable? Where are you looking when you reach for the handle? If you had to think about any of that, no buneo
And as you’re fumbling trying to find the d ring, doubt you’re going to end up stable, go pull on your back, or while spinning and see what happens.
Yeah pulling is the most important part, but what you’re saying is worse than saying it’s a good idea to conceal carry having never shot a single round, I mean just point at the bad thing and pull the trigger till it stops going bang, what’s the worse that could happen?
A emergency rig is even worse, as for one just having it or the sight of it doesn’t help anything other than your illusion of safety, and more over if you can afford the rig, a aerobatic plane and the training that goes along with it, you not only have zero excuse for training on how to use your rig money wise, but as you probably were smart enough to get training on how to use the aerobatic plane, you really should know better.
Again find me a drop zone that will let you do a hop n’ pop with your rig with ZERO training, actually say you watched a sub 110 second YouTube video on the PLF and you’re good to go!
https://www.dropzone.com/dropzones/
Personally if someone I cared about wanted to get into aerobatics and needed a rig, I’d have them get their A license and a rig packed with a ram air reserve, if they couldn’t devote enough time or money for that, well maybe it’s just not the right time for them yet.