Ouch that has to hurt! Said the critter, the fly and the gun.
Last time I had that happen to me I was lucky. My Impact was on my Primos tripod and I was across the room. One of the legs collapsed and the gun crashed to the ground bouncing off of a chair and conveniently landing on a pile of cardboard boxes that I had just broken down for recycling. No damage to the gun but I don't trust my Primos tripod any more.
The time before that I was not so lucky. I was at the range with my S&W M&P15 and a guy came to the bench to the left of me with his AR and set up to shoot. His first volley left casings flying my way and one went down the front of my shirt. It was still plenty hot and burning me. I jumped up and took a couple of steps back because of the shells and the concussion, which was excessive to say the least, from his short barreled AR. Left my gun sitting on the bag on the bench. He fired a few more shots and over went my gun, tumbling off of the bench, hitting the stool on its way to the concrete. I grabbed at the gun on it's way down but it was to far to reach. When the shots stopped and I picked it up I noticed that the elevation cap on my brand new scope had been caved in a but there was no other damage that I could plainly see. After the guilty party moved over and put a bench between us I fired off a few more rounds and found the scope to be right on so no damage I thought. Later when I got home I went to take the damaged cap off but it wouldn't budge. So I got out the channel locks out wrapped the cap in a piece of leather and broke it loose. After unscrewing it I looked down and noticed that what I had in my hand was the whole turret. So much for my new scope.
A few days later I sheepishly approached Primary arms about the damage to the scope telling them in all honesty exactly how it happened. They said send it in. Got it back in ten days good as new and was not charged a penny for the werq. Now that is service!
I changed scopes on the gun a few of months later and left it laying on the bench when I hurriedly took off for home. Went back for it but it was gone.
Poor Poor me in the first world. I had left my my blue $1000 dollar 2240 sitting on a bench one day some months earlier and it was turned in so, I got it back. Guess I was just lucky that time. My memory has improved vastly in the last couple of years. It was pretty trashed out for several years after a brain injury.