I have been pretty lucky really.
Knocked a radiator off a wall in one house,lucky it was plastic micro bore so didn`t do any damage,just popped it back on the wall.
Just after xmas i turned on my pump,while the wand was in a lounge,pointing at a large plasma screen,little did i know that the trigger had jammed,which meant it was constantly spraying the tv, dvd,virgin box ect !
Quick frantic wipe with a towel before custy got back from shop,all was ok,phew.
Went and gouged marks all the way up a staircase with my wand,as i got stuck and just tugged at the hose,wall had been freshly painted,and gouges just filled from moving in !
Only have pub liability,not treatment risk,so if i do mess something up,it`s mine !!