To make it a bit more graspable; A baseball at 90% the speed of light will cause a fairly large nuclear detonation. [0]
This particle moved at 99.99999999999999999999951% the speed of light. IIRC from when I worked it out a month ago or so (baseball with that speed), it was in the region of 10^25 J, pretty close the energy the entire sun is outputting each second or a couple million nuclear bombs. (10^25 particles, 4.8 joule per particle)