They just look, and are very much surprised and interested.
All witches and wizards are born strangely and die violently.

They are descended always from old mysterious breeds, from women who wrought domestic magic and perished for its sake, and from men who wrought other magic among lost causes and wars without gain, and fell and died, still surprised, still interested, with their faces among flowers.

All men who die so are not wizards, nor are all martyred and adventuring women witches, but all such bring a potential strain of magic into their line.
"A witch," said Sarah Brown.

"Of course.

I have been trying to remember what broomsticks reminded me of.