Office worker Mr Coleman, 23, was 'tweeting' to his followers on his Blackberry while jogging to work when he cracked his head on a heavy low-hanging branch.
The force of the impact sent the dazed runner crashing to the pavement and left him with a badly bruised black eye.
Now Mr Coleman has vowed to keep his phone in his pocket while jogging the three miles from his home in St.Andrews, Bristol to work.
"I guess you could say I feel a right Twit," he said
"One minute I was running along posting a tweet, the next I was lying on my back on the pavement in agony.
"The branch came out of nowhere and hit my face hard.
"I could only see through one eye for a couple of days afterwards, but the swelling has started to go down now.
"I was a laughing stock at the office. I don't even use Twitter that much to be honest.
"But I certainly won't be tweeting while running anymore."...