I was something like 4 years old when I saw THIS - and I don't say this lightly - FUCKER from 'James and the Giant Peach' (1996). For what felt like years I had nightmares about this thing at the foot of my bed waiting to chew me up in its mouth full of spinning blades... youtu.be/thcHK3cg3j8?...
youtu.be
James and the giant peach robot shark attack
YouTube video by James Jurovich (Area 51 Productions)