A man who shoved a stranger in front of a train over a “dirty look” has pleaded not guilty to attempted murder. Brwa Shorsh, 24, allegedly shoved postman Tadeusz Potoczek off the southbound Victoria line platform at Oxford Circus station on February 3. Shorsh’s actions were described as “shocking and random violence”, Inner London Crown Court was told. Sam Barker, prosecuting, said that “happily, tragedy was avoided”, with Porotczek avoiding the electrified rail. A passerby rushed to help pull the victim off the track. Experienced train driver Robert Walker hit the emergency brake after spotti…