Good luck if you are participating in this.
http://www.bbc.co.uk/news/uk-england-dorset-32549090
http://www.bbc.co.uk/news/uk-england-dorset-32549090
The event also features a knob eating contest, knob darts and a knob-a-thon
Last year's longest throw was by Dave Morrison, who tossed his knob 21.8m (71ft).
The knob eating contest started in 2012 and that year's winner Stuart Lambert still holds the record.
"He managed 14 in the one minute time limit - he was stuffing two knobs in at a time though," Mr Collins said.