When LIGO detected the gravity wave signature of two black holes merging, it inspired the Simulating eXtreme Spacetimes Project to create this simulation of the event as it would have appeared to human eyes, and post it online. The Astronomy Picture Of the Day site maintained by the folks at NASA then picked it up, which is where I stumbled across it. For those wondering, LIGO stands for Laser Interferometer Gravitational-Wave Observatory, a technology dreamed up by Einstein and an operation run by Cal Tech and MIT. The video is slowed way down so you can make out details, the part of the event simulated took about a third of a second to happen. I particularly liked the gravitational lensing effect, nice attention to detail.