The parents of the 26-year-old man diagnosed with bipolar disorder are alleging excessive force by the Rockwall County law enforcement officers, who first chased the guy for 7 miles along Interstate 30 on September 16, 2010, before tackling him off the bike after he had come to a full stop on the side of the road and afterwards, arresting Austin Guess. 

Watch for yourself.  Of particular note — see the police officer’s two feet lift off the ground as he literally flies through the air during this altercation with Mr. Guess.  Is this excessive force?  Betcha answer yes.