There is something that tickles me about this tweet from the (now) out of hibernation Rosetta space probe.
“Hello, world!”
— ESA Rosetta Mission (@ESA_Rosetta) January 20, 2014
After three years of hibernation, the probe which is on a mission to intercept a comet (yes, in real life, not fantasy), was awoken and signalled its readiness with the classic Hello World message. If only all our efforts and communications were as simple and successful as this.