Angelin threatens Wilson having a knife's spine side against his throat. Camera pans to Hiram and back again to Angelin and Wilson, now the sharp side is against Wilson's throat.
Hiram and Wilson try to shoot the mummy. Just minor pops like firecrackers are heard and there is no muzzle flash.
At the room where carnage has supposedly taken place the blood is obviously added digitally. It appears maybe a second later the camera pans to the walls and disappears before the camera moves on. Also its color is too purple for human blood.