Another bass player decided to plug into my rig for a short set in between the two I was playing. I sat and watched him twiddle knobs, slide sliders, check his lead, check the battery in his bass, re-check a few of those... before finally coming off stage to find me and ask how my amp worked. 'Would you like to borrow my amp then?' I asked. I kind of knew the answer because he hadn't brought one, though he could have DI'ed into thePA. 'Yes please' he said. So I walked onto the stage and released the mute switch.