Couple things to consider.
How big and heavy is the hide that fell on your snake? I had a big, stone hide in with my boa, and I can tell you if it fell on a corn, even an adult corn, it would have broken ribs at a minimum and probably a broken back. The weight of the hide is VERY important in determining if there should be concern. However, if it's a coconut hide or one of those resin half-logs or something, it probably isn't a big deal.
Regardless, I would take the snake out and let it crawl through my hands, feeling for any abnormalities along the ribs and back. Broken ribs are usually visible, but they are always felt as a snake slithers through your hand. They will jut out at odd angles and you can feel small bumps where the break accured.
After checking for any potential injuries...follow the rest of the advice you've already been given. Leave your snake alone for about a week and let it "settle in" before any real handling sessions, and start off slowly.
Yes...corns are generally quite resilient and resistant of injury...but it still happens. Noticing an injury and taking steps to allow your snake to heal properly can be the difference between a clean heal and a disfigured ribcage...
As an example...I found an adult male Cali king not long ago. He had old retained eyecaps, several puncture wounds and slashes on the belly and 8 or 10 broken ribs. I believe he was picked up by a Sowet owl, which would be able to grab him, but not fly off due to size, and thus he was let go. He could not eat and hydrate enough to shed properly, which prevented him from healing properly in the wild. He was blind in one eye from several retained sheds, had pieces of tail missing, and open wounds all over his sides and belly.
I brought him home, got him well-hydrated, soaked him in betadine/water/peroxide solution to clean his wounds, and put him in a warm, quiet, dark place. After a week, I fstarted feeding him F/T mice(which he had no problem taking right from my hand), and in less than 2 months, his ribs had healed, his eyecaps had shed, and his open wounds had closed up.
He still bares the scars of his ordeal, but he is fat and healthy, and lives in my girlfriend's mother's woodpile, where he has done a fantastic job of destroying the native ground squirrel population. He even pops out occasionally and lets us know he is still hanging around...