Anybody make a homemade exhaust flame thrower?

years ago I did some stand up comedy
Once in a while. I discovered that if someone came to the clubs they were for the most part not offended but when you’re not on stage and you can’t read the audience it definitely a different matter there’s a fine line between humor and saying something that pissed somebody off
And there is no way to read intonation online...plus, its so much bigger and audience, someone is bound to get pushed off at something
Thats why I have the signature I do :)