In the season 3 premiere of Supergirl, Kara stops a mercenary (Robert DuBois) from shooting some people. Later, it's revealed that he's involved in a bigger plan, involving alien technology.
However, in stopping him, she knocks him at least fifty feet (probably more) into a car, and he gets up and takes off a few seconds later, barely the worse for wear. Typically, if her opponent is an ordinary human, Supergirl wouldn't do something like that, too.
Is there any evidence that DuBois is superhuman? That is, an alien, a cyborg, wearing high-tech protective armor, etc.?