ostentatious - Characterized by vulgar or pretentious display; designed to impress or attract notice

In an ostentatious display, the socialite walked down the street wearing a fur coat, several gold necklaces, and silk gloves and hoped somebody would notice her.
absurd - (of an idea or suggestion) wildly unreasonable, illogical, or inappropriate

When Edwin Hubble in 1929 suggested that some of the little dots of light in the sky were other galaxies, many people though the idea was absurd, but he was proven to be correct.