Complex sentence: Rodan has layers of spikes on its chest that can be used as a weapon, in the film Ghidorah, the Three-Headed Monster Rodan slammed into Godzilla at full speed, its chest colliding with Godzilla's head to send the behemoth crashing to the ground.
Split into simpler sentences: Rodan has layers of spikes on its chest that can be used as a weapon. In the film Ghidorah, the Three-Headed Monster Rodan slammed into Godzilla at full speed and its chest colliding with Godzilla's head to send the behemoth crashing to the ground.