Of course, you could also find both adjectives in the same
sentence. Then you really need to concentrate on the
intent / context of the sentence. Examples:
- I was shocked by how shocking the accident was
last night.
- They were frightened by the frightening roller- coaster ride!
- I am annoyed by how annoying that person in
front of us is.
- Sally was confused by the confusing street signs in
the city.