A Skip in Time

"Look out at the river. It is the future. Starting from tomorrow and stretching until... Well, further than you can throw. Drop that rock where the water kisses the shore and you can glimpse tomorrow. Throw it with all your might and you will see things you've never dreamed of..." If it had been any other day I probably would have just walked away, but according to him it was the 74th most boring day in history.
I always loved a good loophole and he never said what kind of throw so I decided to skip the stone. If I had only known...