Halloween is definitely over and, there are still some scientific: The Royal Institution is a 200 Year association with its headquarters in London, which will bring you closer through educational events, the people of the world of science. For us they have with pumpkins Thermit filled and explode:

It wouldn’t be Halloween without some exploding pumpkins. In the top jack-o’-lantern, iron oxide and aluminium powder react to spectacular effect. Once set off by a strip of magnesium, which provides enough heat to get the reaction started, the temperature inside the top pumpkin rises to around 2000 degrees Celsius. At this temperature, the iron melts and is spewed out in a rain of fire, and flows out as a river of molten metal into the poor head below. This is more than enough to set off the gun cotton in the second pumpkin, which bursts into a healthy fireball.

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Exploding Thermite Pumpkins! Halloween Science