Your improvised use of your gun was mostly effective, good enough to knock one of the geckos out from the air however it didn't kill the beast. It did make him stunned if only for a moment. The second gecko however was able to get a scratch on you, biting into your leg. While you can certainly feel it, your pants and duster were doing a decent enough job to prevent the gecko's teeth from finding any skin. If it were a bigger one, you'd likely be losing some flesh and maybe even bone. Still you'd ought to act fast. The nasty critter was gnawing, tearing through your duster's leather.