fucking yourself

An elderly man with white hair and a green coat stands behind a counter in a shop filled with various objects, raising his right hand in a waving motion, then bringing it down to his side while looking forward, before the scene cuts to a young boy with blonde hair in a white shirt and red tie standing in a room with shelves, bending forward at the waist with his arms outstretched, then slowly straightening up, followed by a rapid spinning motion of the elderly man that blurs his form, and finally the man reappears with his right hand raised again, as if waving.