Specific energy distribution (left) and corresponding fallback mass rates (right) of models S1.6 (top) and S3.8 (bottom). The colours correspond to different times of the simulation: blue is at the star’s initial position at r_a, orange is at the first passage to r_p, green is during the formation of the two debris tails, red is during the stretching and falling back of the most bound debris tail, and purple is at the second passage to r_p.