It appears to be something out of a fantasy film. But this is, in fact, real life. We see the photo of a tree shortly after it was struck by lightning. The interior of the tree is on fire. This kind of hollow tree has been witnessed to perform similarly to a chimney, with just the smoke as evidence that it has completed all the burning.
The heat causes the water stored in the tree to be vaporized and passed out as steam. If lightning heats up just below the bark, the tree’s surface moisture is changed to steam. The blast creates a hole in the tree that kills it and leaves it with visible scars, as shown in the picture.