That's not really suspicious in describing a new-year's-eve fireworks photo. That tweet was followed by a few more innocuous tweets, and one of the other links

That's not really suspicious in describing a new-year's-eve fireworks photo. That tweet was followed by a few more innocuous tweets, and one of the other links posted suggest Arduini was last seen the next afternoon (~12 hours later). So those words are only 'ominous' with some straining, in retrospect... and are unlikely to be relevant to the disappearance. I point this out just so that people won't see your comment and, lacking context, jump to premature conclusions.