Can you accidentally shake a baby? Can my 2 year old daughter get shaken baby syndrome when older children on an inflatable castle with her jump and bounce too wild around her (she can't jump yet but loves the bouncing)? I've also often seen parents throw their children a bit in the air and then catch them. The children like it and laugh.
I'm not even speaking of law and police but medically. Can this seriously hurt my daughter?
Perhaps something to help you cope with this is that our brain although fragile has a lot of redundancy around it.
On a fall or bounce our neck will decelerate our fall/bounce, there is no need to be an athlete, our muscles have a contraction reflex if they are violently streched (myotatic reflex), less so for very young babies with weak neck muscles (think less than 6/9 months).
Then our skull is filled with fluid which has inertia so the force on the skull is not directly transmitted to the brain. You have to slush the liquid around quite a bit before your brain experiences any meaningful force.
Effectively it is only with some extreme force or internal bleeding compressing the brain that brain damage would occur.