Ah! But can you not also make bridges of stone?

5 seconds sound clip from the Monty Python and the Holy Grail movie soundboard.

You can hear this line at 00:19:18 in the Blu-ray version of the movie.

Quote context

[...]

- Wood.

- So, why do witches burn?

- 'Cause they're made of wood?

- Good.

- So, how do we tell whether she is made of wood?

- Build a bridge out of her.

- Ah! But can you not also make bridges of stone?

- Oh, yeah.

- Does wood sink in water?

- No. It floats.

- Throw her into the pond!

[...]