The phrase "how is this possible" is commonly used to express surprise or disbelief about something unexpected or difficult to understand. It can appear in many contexts, from everyday situations to puzzles, scientific phenomena, or bewildering events. If the question refers to a specific event, scenario, or phenomenon that seems hard to explain, then more details are needed to provide a clear answer explaining how that particular thing is possible. For example, "how is this possible" might be asked in response to a magic trick, a scientific breakthrough, an optical illusion, or a surprising result in a puzzle or game. If there is a specific situation or example in mind, please provide more information to clarify the context for a more precise explanation.