"Falls the wagon" is a phrase commonly used to describe a situation where something goes awry or falls apart. However, there are many synonyms for this phrase that can add more variety and specificity to your writing. For example, you could use phrases like "crashes and burns," "loses its wheels," "falls to pieces," or "takes a nosedive." If you're trying to convey a sense of suddenness to a situation, you might use phrases like "collapses in a heap" or "comes crashing down." Whether you're trying to add more flavor to your writing or simply avoid repetition, using synonyms for "falls the wagon" can help you achieve your goals.