ahhh, tis the little yellow gremlin that lives in the box! it get's awaken when you do any kind of maintainance, goes out for a little stroll and a stretch and usually doesnt get back in on time before you put it all back together...so it hisses at you to let it back in, which you do, unknowingly, when you pull it apart, and put it back together again
back to my corner now.