Professor Grange was standing at the doorway with his wand pointing at all the students as they filed in. They all looked scared and confused. When James and Sirius walked in, however, they took out theirs and pointed them at the Professor.

When he saw them do this, his hard frown relaxed and he cheered them. “Well done Mr. Potter and Mr. Black! 20 points to Gryffindor!”
Everyone’s mouths fell open.
“Class, when someone points their wand at you the first thing to remember is to PULL OUT YOUR OWN WAND! Otherwise they will have the benefit of creaming you.”