"There is plenty of evidence to support a worldwide flood."
Oh, I'm sorry to inform you but there is precisely, absolutely and entirely no fucking evidence of a global flood.
"How do you think those dinosaurs got up in the mountains and died there?"
Let's see if we can work this out. As I see it, there's three options that I can come up with off the top of my head:
1. They lived in the ocean, the floor of which later became a mountain due to rather well understood mechanics.
2. They lived on plains/grasslands/etc. which later became mountains due to the very same processes mentioned above.
3. They lived on the mountains themselves, died and were fossilized there.
See? That wasn't hard, was it? And I didn't even need to invoke an unevidenced supernatural spook to explain it.
"Why do we find fossils of aquatic animals like trilobites and such in almost all the rocks in mountains?"
See number 1 above.
"Is that not evidence that water once covered the whole earth?"
No. It is evidence that you don't understand even the most rudimentary aspects of geology.
"Also, things like the Grand Canyon could be alternately seen as evidence to support a worldwide flood because if as much water as the Bible claims came out of the earth, it may have been able to dig out channels like that in a much shorter time span than geologists believe happened."
Sooo... this grand flood of yours just happened to "cut a channel" in the shape of the grand canyon while not disturbing the surrounding landscape? Yeah, sure.
"I'm not claiming to have any evidence to support this, but it's something we should look at."
I don't have any evidence that a leprechaun lives under my bed either. For some reason those stoopid scientists at the university wont to listen to me and come have a look. I find that very insulting.