Wow, I didn't even notice and had to look at the play=by-play. Yeah, that spike was completely unnecessary and ended up costing them the game.
Also to the end the first half, he passed the ball 3 straight time inside the 20. Left the Packers with bout an extra minute to end the 1st half, luckily they werent able to score, but just dumb to me. The Cowboys are a run team first, not a make Dak carry the entire offense and pass for 300+.