I created Eta Carinae and placed a dusk disk around him. Because of its gigantic mass, has Eta Carinae huge outbursts. The matter burst out and then fall back on its surface (the outbursts are about 3-4 times the mass of our sun).
I simulated such an outburst with low esc. velocity. So the mass fall down on Eta Carinae in same seconds. But it shattered the disk and then after time, it formed them into really amazing way.
I made a video and uploaded it on youtube.