My former roommate is eternally grateful to me that I didn't tell this story in my toast at her wedding...
She wanted to make fresh salsa, and we didn't have a food processor to chop the cilantro. So she used the blender. And was using the pulse button and pushing the chopped herbs back down into the blades as they stopped each pulse. With her fingers. I walked in and saw this, opened my mouth to suggest that she use a wooden spoon for that when the inevitable occurred.

To her credit she grabbed a towel, wrapped it around her fingers, sat on the floor with her hands over her head, and screamed "911 911 911" over and over until I had the phone in my hand and was speaking to the dispatcher while putting pressure on her fingers myself.
Then I got to unplug the blender and look for fingertip pieces...fortunately she hadn't lost any, just a very very deep slice.