Microwave Spares What Would Be A Good Object To Put In A Microwave To Make A Big Explosion?

What would be a good object to put in a microwave to make a big explosion? - microwave spares

In looking for new ways to air blast fun microwave, just for fun. I'm losing a few pieces, but it needs to get something new, a big "BOOM" it.

Suggestions would be helpful.
thanx.