"It wasn't an accidental kind of push. It was a clear deliberate barge in the back," said Shierlaw, who reported the matter to the police.
Asked why Sprey might want to barge into him, Shierlaw, a three-term former councillor, said: "He's on [Mayor] Ray Wallace's ticket and I don't support Ray Wallace."
Shierlaw's version of events was backed by councillor Josh Briggs and council candidate Chris Parkin, who both said they saw Sprey shoulder-barge Shierlaw.
Briggs said as he saw Sprey walking the down the aisle, his body, face and arms tensed, he took a couple more steps and shoulder charged Shierlaw.
"I turned to him and said 'what is that about' and he turned back to me and he said 'the knives are out' and kept walking," Briggs said.
Parkin thought the incident could have been because of Shierlaw's vocal opposition against the mayor.