Visualization of the GMCs with strong CR feedback, each from a snapshot with rapid BH growth. Left two zoom-in plots: Line-averaged mass density (top) and CR energy density (bottom) near a BH undergoing runaway accretion, based on a 10⁶ M_⊙ GMC. We zoom in near the BH, from the left to the right panel, as in Fig. 3. The line-averaged density is evaluated within the box of each panel. We see a high-energy CR bubble generated by the BH. Right two zoom-in plots: Same as the left plots, but embedded in the 10⁸ M_⊙ GMC.