I’ll use my pew pew: no you won’t, no chance, not enough time! There are so many people that tell you that using their self-defense they will pull out their gun and shoot you if you pull a knife out or do anything to them. They do not understand that by the time they even think of pulling out their gun, they will be cut into smithereens. I guess you haven’t heard that word in a long time. You can add these techniques and thoughts to your fighting system whether it be BJJ, MMA, maryialarts, Karate, SmallCircleJujitsu, kungfu, KravMaga, Aikido, military, and law-enforcement specialties. SUBSCRIBE , click the link in the bio, and go to learndefense.com now! 
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These guys train all the time thousands of reps.
"That guy" doesn't train!