id take the gun back where you bought it from and get money back. haha. I wouldn't want to stick anything down the barrel of my gun, or smack it with an open hand on the slide or jump on the grips. I would take it to a gunsmith, some one that is certified. Lets say you jump on your grips and miss, for 1 the gun is falling, so are you, gun could go off, you break something or injure something when you fall/cant go to work. In a quick pinch i would say do smack or jump method, but the percentage of injury versus actual work getting done is not good. I would just take it to a gunsmith.
then when you get the gun back, just ask him what he did, and if he says jump or smack, then the fellers above me would be 150% spot on. but somehow i don't see a gunsmith saying jump or smack, i maybe wrong too.