Robby is so perplexed not being told about the accident.
Maudy always gets nervous when talking to strangers.
Both sentences have a predicative adjective as a subject complement. My confusion is about those two phrases after the adjectives. As far as i could tell, you can't put a gerund phrase after an adjective because it acts as a noun. It can be a subject, an object, an object of preposition, or a complement but not an adverb.