我听得懂 - I can understand you!

Yesterday to vagabonds I wore a rather cleavage enhancing corset. Coming home on the bus I headed downstairs to get off and there were a group of 5 or so Chinese men, who then proceeded to have a conversation in mandarin about my boobs. I laughed and turned round to Bill and Ruth and told them this. The guy sounded closest to me obviously heard what I said and looked quite surprised. So I said 不好意思！(how embarrassing). His face nearly dropped to the floor, he totally wasn't expecting me to know any Chinese. It was hilarious! He then tried to start a conversation with me, but we just laughed and got off the bus...