Another example of the proper usage of this phrase is when, as a stranger, you want to point something out of benefit to someone, as in " Excuse me, (but) I believe you dropped something out of your wallet."

另外一种使用该短语的合适情形是，当你作为一个陌生人时，想为别人指出某件事情时。比如“打扰了，（但是）您的似乎是从钱包里掉了什么东西。”