Sure, I'm pretty sure I can throw a racket or ball close to 80 degrees upwards, as I've done hundreds of times in my youth playing littleleaque or 8th grade baseball. We used to throw the ball 120' up in the air from SS to 2nd base just for fun.
But can I actually do it with a service motion? I think not.
Gumby can, as can Elasto Man, but not me.