Jordan Hipkins came up behind the woman on his bicycle as she tried to "power walk" away from him, said Rob Galley, prosecuting.
She screamed when he grabbed her shoulder from behind and told her in a loud, aggressive voice: “Give me your bag", York Crown Court heard.
When she threw her bag to the ground, he scooped it up and rode off, leaving her distraught and running up and down the road in panic, said Mr Galley.
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