Mike McCaffrey 
Sweetgum seed pod.
Apparently, some people have enough #sweetgum trees that they need machinery to deal with all the seed pods!
Luke Kanies@mikemccaffrey the city is absolutely covered in them right now
Joe 
@mikemccaffrey , love the pic.
How rigid is it? I'm thinking it painful to step on barefoot.
How rigid is it? I'm thinking it painful to step on barefoot.
@Antigrav Yup, they are solid little spiky balls! Luckily they are not terribly sneaky and you see hundreds lying on the ground around the tree. And even if you do step on one, the spikes will break before your skin does, like that one at the left of the photo.