ok, all is well. i sliced it on the mandolin when i was doing the zucchini (thin slice, not thick, thankfully). So I felt the slice, and thankfully didn't bleed into the zukes. But there was a surprising amount of blood. Thus I noted (I made a fist to staunch the bleeding), that amongst the blood the angle of my fingertip look funny...
I look through the zucchini and lo and behold, there is the piece of finger. So I pick it up, and am debating with myself whether it's big enough to sew on, and mourning the probability that I'll probably have a funny finger (not the first mind you). At this point I notice there is still an awful lot of blood and it's dripping on the floor and there are people coming and I don't want to do extra cleaning. So I go to the bathroom, and get really agitated and flustered because the Child went #2 and didn't flush the toilet. Dammit. That means she didn't wash her hands. We're working on this.
My brain blew a fuse from the overload and that's when I lost track of the finger. Did I leave it in the kitchen? Did I set it down? Did I flush it?
Anyway, a neighbor dropped me off at the ER, and I got some respect from the staff in regard to blood volume in the towels and size/depth/sharpness of laceration.
I am also proud to report that the Child did excellently, helped me clean up the blood and did not freak. We wanted to examine the wound more closely, but we couldn't due to blood surge. So a little scientific learning opportunity was lost, but I'm quite certain there will be more.
The story ends with the veggie lasagna turning out mediocre, due to inattentive assembly. I'm just not that domestic. Or coordinated it turns out.
The moral of this story: do use the stupid little safety device that comes with your mandolin.