When spoken to by police, the man denied making threatening gestures.
"The description of the gestures that [the man] gives in the audio interview is that he had a broken left hand and it was in a cast and he was stretching that," Mr Burston said.
"When it was put to him what had been observed by witnesses he gave an explanation that he had a goatee beard and that he was stroking his goatee beard in a particular motion starting on his moustache and ending up under his bottom lip."
The first witness said he saw the man making a "pistol-type hand gesture".
The jury foreman then saw the man making a "keep-your-mouth-shut type gesture" to a second witness.
The foreman passed a note to a fellow juror saying this, Mr Burston said.
That juror looked at the man and saw the same thing.
The Crown will call six witnesses.
In a brief opening, the man's lawyer Eric Forster said it was "pretty obvious" what the defence was: The man was rubbing his face and wasn't intending to make any gestures saying witnesses should be silent.
The judge is hearing the case without a jury.