@SuicideBlonde You can probably save your banana (or plantain). I'm pretty sure they can grow back from the base. I don't know if you can root the top and plant it though.
A bit off-topic, since it isn't about edible plants (well, actually it could be- more about that later * ): That strip of ground in many neighborhoods between the sidewalk and curb is sometimes called the "hellstrip" because it's so harsh a growing environment. (But look up Shel Silverstein's poem, "Where The Sidewalk Ends", for another take on this). Anyway, over the years, the grass in that area in front of my house has been taken over by (Latin names from my imperfect memory): least hop clover (Trifolium dubium), Lady's Thumb (Polygonum persicaria), and peppergrass (actually a weedy plant in the Cabbage family). I have creeping bellflower (Campanula rapunculoides) in my yard; it was brought here by Europeans as an ornamental, but in some areas, it's classed as an invasive. The Lady's thumb and clover look as good as grass, I think, except that Lady's Thumb looks awful when you mow it, and you have to mow it because although it's naturally low-growing it's still too tall to allow to grow unchecked where people will be walking. I'm planting a small patch of the hellstrip (less than 10' to start) with bellflower and maybe Lady's Thumb, with a row of bricks or rocks bordering this patch and going from the sidewalk to the curb. I started some bellflower last year and 2 plants came through the winter; I planted a few more over the past week. The curb and sidewalk will keep them from becoming a problem, but I wonder if they'll start slugging it out with each other...
*-supposedly, Creeping Bellflower and Lady's Thumb are edible- but I wouldn't eat anything from this area because of dogs doing their thing in that area, and possibly lead accumulated the soil from the days of leaded gasoline. Even beyond that, though, I'm not sure I want to eat a lot of something that doesn't have a solid history of being regularly used as food.