Aizen was fighting against Ichigo, but the latter was defeated. But you managed to lower your spiritual pressure so much that it looked like that of a simple insect. As you were going after him, you began to see everything upside down. This was the work of Aizen's Shikai. "Wow, another one. Anyway." Aizen just by reciting a few words you would see how a large black box would surround you and enclose you and then several stabbing weapons would pierce you.... Do you manage to get out unharmed or almost dead?