One of its two wind probes was knocked out, most probably by a piece of grit kicked up by the rocket-powered descent stage that placed Curiosity on the surface.
Three years later during STS-27, Atlantis' heat shield sustained severe damage from a piece of insulation that broke off of the right solid rocket booster during launch.
Useless was definitely there, including a piece of matzo laser-etched with actor Leonard Nimoy's image, a rocket-powered motorcycle built by a Brooklyn, N.