This is a video discussing those stinging little red shit fire ants (Solenopsis Invicta) and their classification as a viscoelastic material. That means a group of fire ants have properties of both a solid (elasticity) and a liquid (viscosity). The video was actually pretty fascinating, mostly because I can't believe people have spent so much time studying fire ants and writing mathematical formulas about the way they move and not just destroying their ant hills with a stick. "Or setting a whole bunch on fire with a magnifying glass." Okaaaaay, future serial killer.
Keep going for the video. It really is fascinating.