Smallest thing that can kill you?

The thread makes me think of this case

but it was a few drops so I guess it doesn’t qualify.

Mozzies have killed millions (malaria)

Wow. So, I guess the moral of the story is: Don’t stick your head in a particle accelerator. It might not kill you, but still… just don’t.

Damn, and I was all set to run up in here and say, “My teacup.” Oh, well. As you can see, it didn’t stop me.

Ha! Wikipedia says this about him:

…but that’s obviously a cover story; in reality, after the accident, he was fatigued from spending his nights fighting aliens and supervillains.

Yes, mosquitoes have killed orders of magnitude more humans than any other multicellular animal.

My own nomination:

Misplaced decimal point, if you’re a Mob accountant.

I actually wound up with one of those wires in my meal once at a restaurant. They apologized profusely, remade my meal, and comped it.