Video suggesting that asteroid TU24 could cause destruction on Earth if it emits a plasma discharge similar to Comet 17/P Holmes. On Oct. 25th 2007, Comet 17/P Holmes appeared to 'blow up' to the amazement of astronomers and the outburst from the comet grew to a size 40 times more massive than our sun.  If such a rare event were to occur close to the Earth, doom and destruction would be inevitable according to this video.  Also includes the rebuttal video by Phil at Bad Astronomy. 

"This animation zooms in on the centre of the Milky Way using images taken by the Chandra X-ray Observatory. It ends with an artist's conception of the galaxy's central black hole, Sgr A*, and a disc of matter that undergoes a flare as it falls into the hole."