Dan Biddle was just metres away when a profound, bright white flash engulfed his London Underground carriage. The sudden detonation on the train plunged the ordinary morning commute into an immediate scene of chaos and devastation. In the split second before the world fractured around him, Biddle registered the stark reality of the unfolding horror. Amidst the shock and the immediate aftermath, a specific image was seared into his mind: a direct, fleeting encounter with the individual responsible for the blast. This unforgettable visual has remained a persistent and haunting presence in his life. The sheer scale of the event, coupled with that indelible moment, has ensured that the trauma is not confined to the past. Years later, the stark memory, particularly the image of the man, continues to surface unexpectedly, making the experience an ever-present part of his reality. His perception of the world and his everyday encounters are often filtered through the enduring imprint of that devastating day and the unsettling visual that remains so vivid.