By Matt Audilet Carolina Panthers head coach Matt Rhule is facing some heat from NFL fans for being a buzzkill at training camp practice. On Saturday, newly-signed quarterback Baker Mayfield hit his longtime Cleveland teammate Rashard “Hollywood” Higgins on a deep touchdown pass. Higgins celebrated the score with his patented “red-carpet” celebration — much to the chagrin of his new head coach. Higgins was flagged for targeting and Rhule stopped practice, yelled at the team and made the offense run. The NFL world isn’t too happy with Rhule’s coaching style. “So in addition to winning football …