When something doesn't go as planned or something unexpected happens, we usually use the phrase "went wrong". However, there are many synonyms that can be used to express this idea, depending on the context. Some examples may include, "failed", "fell through", "fizzled out", "broke down", "crashed", "misfired", "backfired", "went awry", "went south", "went off the rails", "derailed", "came apart at the seams", "messed up", "went haywire". Each of these phrases conveys a sense of disappointment or frustration when things didn't turn out as expected, highlighting the importance of learning from our mistakes and finding new ways to overcome obstacles.