What would happen if you put a metal bowl full of candyfloss in a microwave?

If you put a metal bowl full of candyfloss in a microwave, the metal could cause sparks and potentially damage the microwave, as microwaves should not be used with metal objects. The candyfloss itself would not heat up effectively, as microwaves work by agitating water molecules, and candyfloss is mostly air and sugar. Instead of melting, the candyfloss might just become a sticky mess without any significant change. It's best to use microwave-safe containers for heating food.