BIll Belichick has mastered the art of the sassy challenge flag spike
What Bill Belichick said about his unorthodox game plan after Patriots' win over Bills - The Boston Globe
Patriots' Bill Belichick delights fans with demeanor as he slams challenge flag onto ground
Brian Flores lawsuit: Bill Belichick text gaffe plays key role - Sports Illustrated
LOOK: Patriots' Bill Belichick spikes challenge flag near official with disgust during 'SNF' loss to Dolphins
Bill Belichick spikes his challenge flag into the ground
Bill Belichick Throws Challenge Flag Like A Petulant Child Toward Ref's Face
Bill Belichick on dealing with booing Jets fans, the NFL trade deadline, and Halloween - The Boston Globe
I'm gonna hit this car': Ex-Patriot admits hitting church van to avoid wrath of Bill Belichick
Why Bill Belichick's arrogance may finally end Patriots dynasty
NFL draft: Top 101 busts of all time, from Ryan Leaf to Sam Darnold