I saw a surf band once where one of the guitarists every once in a while jumped down hard on the stage next to his amp to excite the springs. Cool effect, though not very essential
i would think this is just a rumour. After all, a smartphone doesn't need to be slapped hard to register the shock, but the profiler is like 10 kilos of solid german engineering... Unless you put it in a shock mount you'd have to kick it pretty hard, I guess... Not something I'd want to do. Not those guys having it in a rack with 10 other pieces of gear
Tremolo Beergut kick their reverb tanks every now and again mid-song for that surf wash effect:)
Cheers,
Sam