That screw driver jammed itself in there itself

My computer’s been making an odd noise and today I found that it was the fan on my graphics card.  I tried to clean it, and get the annoying buzz to stop I popped out the fan and gave it a thorough dedusting during which I lost one of the peg standoffs.  After putting the card back in the computer, the buzzing was much louder, so, while running, I started jabbing at the fan with a precision screw driver trying to dislodge what could be making the noise.  Despite my grace and agility, I lost hold of screw driver after it was stuck under the fan and the spinning fan launched the screw driver into my case fan while the GPU fan spun down to a halt.  So, I performed a tried and true ritual of the DIY computer owner: I lied to tech support.
Tech Support: “Sir, do you see anything under the fan”
Me: Seeing piece of dislodged fan plastic, “No, nothing”
Tech Support: “That’s odd, usually the blades only have problems if a user tries to access the fan, have you sir”
Me: “Not at all, I don’t even have a screw driver”
Tech Support: “I’m sorry Mr. Robinson, we’ll send a replacement soon.”