Complex sentence: While driving, Skeeter is suddenly greeted with a shower of gumballs caused by a crashed candy delivery truck he doesn't see, so he concludes that the story had come true and quickly develops a plan.
Split into simpler sentences: While driving, Skeeter is suddenly greeted with a shower of gumballs which he does not see is caused by a crashed candy delivery truck. Skeeter concludes that the story had come true and quickly develops a plan.