That's not what you want to do in your NFL debut, Pete Robertson.

The Redskins rookie linebacker, who was promoted from the practice squad this week, cost his squad a ton of yards and, worse, made himself the butt of Twitter jokes when he failed to properly down a punt Thursday night against the Giants.

Robertson fielded Tress Way's kick at the Giants' 7 and then jogged into the end zone, turning an inspiring special teams play into a distressing touchback.

And, lest you think people are in a forgiving holiday mood . . .

Yeah, that pretty much negated Robertson's tackle on the opening kickoff.

Hang in there, rook.