Igor has been sending his sick time on the stand so The New Guy has had the gig bag. One night I was super tired and really shouldn't of pulled New Guy out [or just got distracted]. When I did call it a night I just slid him the the bag and slid that under the bed [where the gig bag lives] without so much as reaching for the zipper.
Later as I stumble to the bathroom my foot hits something that should not be on my bedroom floor: a bass knob. In a sleepy haze my mind tries to figure out where it came from. [I put all of Igor's back on and they require a allen wrench to remove.] New Guy's knobs can be pulled off by hand but they were on as I tossed him [carelessly] into the bag.
In the morning I confirmed that the knob was from New Guy [though I have no idea how it left the bag] and as I go to pull him from under the bag the bass just slides out. [The zipper on the gig bag faces the wall so how the knob got out is really a mystery.]
Lesson learned, zip [use] the gig bag!