The thrill killer shoots 80 times from same gun.
The 3 tones heard when the 3 bowling balls rolled off the cabinet, hitting the Thrill Killer on the head, comprise the 3-tone identifier for NBC known as the NBC Chimes that date back to at least the early 1930s. This appears in many Three Stooges shorts.
The third consecutive Stooges short to reuse footage from Hold That Lion! (1947), in this case the file cabinet scene.