There is a record in Dunhuang Dream Interpretation: "Those who dream of going to the bridge live a long life." Therefore, this is a good dream, but after crossing the single-plank bridge and a person falls, this dream may have such a moral: you may have a "burden" that endangers your health or life recently, but you can't give up this burden on your own initiative, but you have to give up because you are not satisfied, that is, you give up this burden that is unfavorable to you so that you can spend it safely in the future. Perhaps this kind of giving up is a little price you need to pay for what you have gained.
But from psychological analysis, this dream may indicate that there is a competitor in your recent life or work that you don't like very much, but you can't get rid of. Your dream expresses your desire to get rid of him or her. Because of his (her) existence, it will affect your most desired success.