Enigma of the Bernhard Riemann geometry

The center of our own Milky Way Galaxy,a black hole named Sagutarius A, has been mostly dark as expected to be by the hyperbolic curvature of space that captures and devours every passing object. It flared recently in a palette of bright fires, giving scientists reason to wonder if we are witnessing the remains of a passing gas cloud gas being crushed by the power of the black hole gravity, yet supposedly all light being convoluted, but apparently not.