POC

From Touhou Wiki

The POC, or point of collection, is an invisible line about 1/4-1/5 of the way down the screen; the exact location depends on the character selected. When the player character moves above this line at full power, (in Imperishable Night in Youkai mode or with Marisa as well; in Mountain of Faith, Subterranean Animism and Undefined Fantastic Object at any power level) all items on the screen will automatically be drawn to the character at a moderate speed. They do not stop if the character moves below the line before they have been collected. This feature first appeared in Embodiment of Scarlet Devil.