The original French title of Didier Van Cauwelaert's novel "Hors de Moi" roughly translates as "Out of My Head," which captures the existential dilemma at its heart -- after spending ten days in a coma in Paris following a car accident, American botanist Martin Harris returns home to discover that no one remembers him. There's a perfectly logical explanation for this, of course -- and the search for that explanation becomes the entirety of Jaume Collet-Serra's energetic action-thriller, which moves all the action to Berlin, casts Liam Neeson as Harris and dispenses with Van Cauwelaert's intriguing meditation on identity in order to pack in as many punch-ups, car chases and explosions as possible.