apps is genius! Well you can use the snapchat app! Or make a san milar one!!
I dunno if it's popular over the seas or you have something similar, but yeah, you'll just send short shots of yourselves to each other.
Then the other guy will have to do the same trick on a similar feature in his park, and snapchat it back. This way you can have a time limit to make sure you can't try like 50 times to nail it, sure, you could do a couple of hits if lets say you are given like 5 - 10 minutes. But that's fear cause it would be like that for both.
If you can't send back a video of you nailing it by then, you'll get a letter.
If the app had scoring it would be perfect, cause then the receiver can press like OK or something when he sees the trick getting landed!!