"So, how long do you think it would take for a snowball to hit the bottom?"
A simple experiment is worth a thousand expert opinions. (spoken like a true engineer)
Perfect trajectory!! (more engineer words)
Hmmm, make that at least four experiments. (btw, that was COLD snow!!)
Remember this post? I guess the message is: if the hole is big/deep enough, Keller Dudes want to throw something in it.