The Knight Bus

[Marugg]

No: HPFGUIDX 59100


Everytime I reread PoA I come across a passage which I don't understand completely ( or at all). My question is :  what or who makes the Knight Bus appear at Magnolia Crescent?
Quoting Stan : "you did flag us down, dincha? Stcuk out your wand and dincha?"
"Yes, said Harry quickly.

But, he does never call the Bus, it just appears when he was trying to discover what(Sirius) was hiding between the fence and the garage. Then his leg hits his trunk, he trips, he loses his wand and this is the exact moment when the Knight Bus appears, almost running Harry over. SO my question remains the same : who calls the Knight Bus?

Mariana ( who is not a native speaker and  would like you all to excuse her for her grammar and spelling mistakes)


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