Peter Pekarik pounces on Benjamin Stambouli 's mistake .
Peter Pekarik finds Mitchell Weiser , who whips an unstoppable first - time effort into the roof of the Schalke net .
Peter Pekarik pounces on Benjamin Stambouli 's mistake and finds Mitchell Weiser , who whips an unstoppable first - time effort into the roof of the Schalke net .