Redskins Cowboys post game

[htownskinfan]

Originally Posted by WillH

End zone interception triggers rarely-used rule | ProFootballTalk

Ok now that has been explained,can someone explain this call? With 7:06 in the first qtr romo is under pressure and scrambles out of bounds for a couple of yards.Flag on redskins on the play for illegal contact.Ref gets on the mike and says"illegal contact on #31,this 5 yard penalty will be ADDED TO THE END OF THE RUN.WTF? Since when do illegal contact penalties get added to the end of a run?I thought you either took the 5 yard penalty for first down or nothing,am I wrong?