LONDON — A tearful Kristen Stewart completely lost it in a public outburst yesterday, leaving passes-by stunned as she snarled at her personal trainer. Shouting hysterically and waving her arms in anger, the stressed actress had been keeping an extremely low profile until this meltdown. Kristen was looking pale and drained as pressure of the split with Robert Pattinson was clear to see. Wearing a baggy white T-shirt — that could have belonged to Rob — and skinny denim jeans teamed with bright red Nike trainers, she took off her sunglasses to reveal her piercing stare. Pointing at the older man, Kristen looked like a stroppy and uncontrollable teenager. She was visibly shaken after her rant and took a moment to gather her thoughts before getting into her Mini. Nobody knows where Kristen has been staying since she was exposed for cheating on her boyfriend of four years with film director Rupert Sanders . — Agencies