These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Crosses the Line Twice: And old lady being threatened by a giant monster: not funny. An old lady watching in horror as her cats are messily devoured by a giant monster: big time, not funny. An old lady pulling out a rifle and blasting the face of a giant monster who was threatening her and her cats into Ludicrous Gibs? Comedy gold.
Of course, the YMMV factor comes from the aforementioned corniness of said deaths; even the latter example just looks like the dude is orgasming.
Paranoia Fuel: Any mundane scenario that you're in - going to bed, riding the subway, being in class - is just ripe for interruption by horrific dinosaur attack. The fact that it makes no sense at all (trilobites eating people's eyes?!) is little comfort.