I can still recall the nightmare I kept having in the latter stages of building our home. We bought one of those Wagner power paint sprayers. It worked well until either the bucket level dropped too low, or the sprayer experienced a change in paint viscosity. When either occurred the sprayer would make loud, obnoxious belching sounds until we shut it off. I had nightmares that sprayer was chasing me around the house, constantly making that bleaching noise.
Now my nightmares include the sound of packing tape as it's wrenched of the spool and applied onto a box.