I love crash blossoms (newspaper headlines that are easily mis-parsed on first reading). Here is one I saw in today's BBC World News site:
Of course, flare-up should be parsed as a noun, so in Gaza flare-up is a prepositional phrase functioning as an adverbial. This becomes apparent when you read the paragraph following the headline.
This headline is probably not really ambiguous, as flare-up would not be hyphenated if it were a verb. But never mind: I did mis-parse it initially.