| Quote #1
For I have never been afraid / Of anything. Not very. (Scared.4-5)
When a statement like this appears at the beginning of a story, it falls under the category of Famous Last Words.
| Quote #2
And then they moved! Those empty pants! / They kind of started jumping. / And then my heart, I must admit, / It kind of started thumping. (Scared.14-17)
Uncommon things tend to scare us because we aren't equipped to deal with them as easily as common things. Pants moving about without an owner inside definitely counts as uncommon.
| Quote #3
Now, bicycles were never made / For pale green pants to ride 'em, / Especially spooky pale green pants / With nobody inside 'em! (Scared.34-37)
The madness continues. Pants moving without a wearer is unnatural enough, but pants riding a bicycle is downright freaky.