Manuel Tzajguachiac, 25, was fatally struck by a blue BMW SUV last night while crossing 65th Street near 20th Avenue in Bensonhurst. Witness Roman Ximeyo told the Daily News the crash was so hard it sounded like two cars hitting each other, and said, "The guy's stuff was on the corner, and he had flown down the street. He was on his stomach on the floor." Tzajguachiac was pronounced dead at Lutheran Hospital, and police say a man surrendered to cops at the 62nd Precinct three hours after the crash. He was released after questioning.