The 77-year-old pensioner was standing at an ATM when three men appeared, clearly thinking they had found an easy target. Seconds later, they would realize they had chosen the wrong grandmother to mess with. Most people learn early in life that grandparents aren’t the ones to cross—but some lessons hit harder than others. In Wirral, UK, there’s one grandma who has ensured that lesson is unforgettable. Her name is Winifred.

It was a quiet afternoon when Winifred, dressed in her usual sensible coat and scarf, went to the ATM to withdraw some cash. She had done this hundreds of times before, always polite, always patient, always careful. But this particular day, fate had something different in store. As she inserted her card and typed in her PIN, she noticed a man approaching from behind. Her first thought was caution—but it didn’t take long for the situation to escalate.

Before she could fully react, two men grabbed her from either side, trying to throw her off balance. A third man appeared, reaching over her shoulder, trying to intercept the transaction. He attempted to withdraw 200 euros from her account, thinking he was clever, thinking he had chosen someone frail, someone easy.