A little update about what I've been working on in my head
You know what would make crocodiles so much scarier?
If they could walk on ceilings and walls! Like bugs do!
The same thing probably also applies to alligators of course, although I'm not certain if they would be as good at walking on vertical or inverted surfaces. The scare factor would decrease considerably if you saw an alligator lose its grip and drop off the ceiling.