Sorry, but the rising fastball is just an optical illusion. It is physically impossible to throw. Well, unless you throw submarine
The illusion is that the pitch is a faster one than the batter has already seen. He (the batter) makes a mental model using the slower pitch that he had already seen so when the faster pitch's trajectory is different (slightly flatter) then he assumes that it actually had upward movement.
Good luck pitching. Sounds like you had a good day.