Don’t know if this was known before I asked around and seems like no one knew about so I made a video of Ryu’s Unblockable Jump in Mk vs Cammy.
The first set up could be used (may be) if Cammy tries to do a high cannon strike that hits the top of your head and tries to follow it up with a grab or normal pressure. You Lp Shoryuken take a little fraction of a step forward then jump right when or a little bit before she hits the ground from the shoryuken then Mk
Can be escaped by whiffing Spiral Arrow,Spin Knuckle, cannon spike Crouching kick, Back dash, dash under,
crouch for a little bit then block as a crossup.
The second set up can be done from a back throw and is more reliable. You back throw take a full step, jump then Mk.
Can by escaped by whiffing cannon spike, Dashing under, Back dash, crouch then block as a crossup
Now that I think about it may be you could use set up 2 to set up the right space for set up 1. Again I’ll have to test it more on Cammy and others.