Schematic cartoon model of the formation of the streamer blob observed here. (a): The general magnetic topology of the streamer. The bright features of “N1” and “N2” are located in the southern legs of the overlying loops. The horizontal red arrows indicate the upward expansion of the loop system and that results in the squeezing of the overlying loop system (the vertical red arrows). (b): The geometry of the streamer while “N1” and “N2” have merged (or simply been arranged along the same line of sight) and pinching-off processes take place near the apex of the lower-lying loops. (c): The geometry of the streamer when a flux-rope-like feature (“N3”) has fallen off due to the pinching-off processes. Magnetic reconnection might take place while the flux rope moves toward the overlying loop system, allowing it to escape from the close field. (d): The geometry of the streamer after the flux rope is released in the open field system. The distortion of the field line resulting from magnetic reconnection could provide additional magnetic tension to drive the blob to move outward. The flux rope might also continuously interact with the open field and interchange magnetic reconnection might occur intermittently all the way out until it is fully dissolved.