if the pet owners were to see you doing this they would not think it funny
Oh Robert, everyone thought it was funny. It was Tom & Jerry in real life. All that was missing was the 'scuttling' music to accompany the rapidly scrabbling legs. If there'd been You've Been Framed in those days we'd have videoed it and got £250 a time!
Maybe if the pet owners saw this, then they must have actually seen their pet trespassing and not brought it undr control?