There are two standouts that I feel i must share. The first one was when I showed up to a show with my bass, head, and cab. The soundguy looks at me and does a double take. He says "Woah buddy, we already got PA subs. I appreciate the effort though." referring to my bands Mesa 215.
The second one was unfortunately, committed by a fellow bass player. I arrived to a show where the last band was letting everyone use their equipment. Sure no problem. I get on stage and set my bass in its molded case in front of the amp. The bass player that owned the rig sees my case and suddenly freaks and says "you'll blow the amp. You have to go to the other side" He was pointing at a guitar cab. After mentioning that inside my case is a bass, he proceeds to lecture me about the difference between playing bass in rythym guitar and playing bass GUITAR. I was so agitated because even after I unpacked my equipment, he doubted it was a bass at all and I would blow his cab.
That was my 3 minutes of ranting.
The second one was unfortunately, committed by a fellow bass player. I arrived to a show where the last band was letting everyone use their equipment. Sure no problem. I get on stage and set my bass in its molded case in front of the amp. The bass player that owned the rig sees my case and suddenly freaks and says "you'll blow the amp. You have to go to the other side" He was pointing at a guitar cab. After mentioning that inside my case is a bass, he proceeds to lecture me about the difference between playing bass in rythym guitar and playing bass GUITAR. I was so agitated because even after I unpacked my equipment, he doubted it was a bass at all and I would blow his cab.

That was my 3 minutes of ranting.