Johnny Manziel Browns should keep out of harm's way

   Johnny Manziel was all smiles when Kyle Shanahan stopped by his stall in the visitor's locker room at Ford Field on Saturday night for a quick chat.

That Manziel still had a bounce in his step as he headed to the buses was a good sign, too.

Manziel made his NFL preseason debut against a cast composed primarily of Detroit Lions backups, and he survived. During a quarter-and-a-half of work after relieving Brian Hoyer, he looked like he belonged on an NFL stage. Even added a spark.

Yet the same element of Johnny Football that undoubtedly excites the long-suffering Cleveland Browns fans is the same element that will make them worry.

Johnny Football can make a split-second decision in a hurry, and make something happen.

That was evident on his signature play of the night. On a fourth-and-1 from the Detroit 29, Manziel, listed at 6-0, 210, took a snap from the I-formation and rolled out to his right. Fullback Ray Agnew was open in the flat, but Manziel's vision was obstructed by onrushing linebacker Kyle Van Noy.