Haha, all right, that's different!

I was envisioning you riding down the narrow shoulder of a busy highway with wooden crates and furniture and stuff falling off flatbed trucks right into your path! Well, not really, but more along those lines...

Can you pop a wheelie, like enough to get the front wheel over a curb? If you can do that well then often you can just sorta slow down and pedal your way over the rest of the curb or root or whatever, unless it's too high to clear the chainrings, in which case you get your front wheel up and over the thing, move forward a bit, then slow down and do the same thing with the back wheel. I can't explain the motion in text but it's pretty easy, you sort of "jump" up a little bit with your feet still on the pedals and the rear wheel just comes up. Be careful to not let your body go over the handlebars. Probably better for you and the bike to keep one wheel on the ground rather than bunny-hopping over everything, but once you master both of those motions you then know how to jump, you just do both together as one motion instead of two.

I mean, those obstacles will slow you down pretty much whether you hop one wheel at a time like described above or jump over them all, but it's still a lot faster than walking, eh?