The first sensation you are likely to notice is nervous tension. You are not sure what you are getting yourself into and it is natural to have more awareness of your heart rate and blood pressure, just like when you start any new activity that carries a lot of responsibility. After you shoot you will notice the smell of sulfur similar to fireworks or a burning match. There may also be a small plume of smoke that will clear quickly. When I shot 50 rounds to qualify for my Concealed Weapons Permit (CWP), I was physically tired afterword, as if I had run a race or engaged in physical labor.