people who talk in tangents when the meet david beckham

why do people who meet david beckham always talk in tangents.you all know what i mean.
i was sitting on my own in the corner of a cafe in oxford st in london last tuesday afternoon ,i was just after ordering chips and fish and a cup of tea ,and was reading the newspaper when you will never guess who walked in the front door and sat down at the table facing me and said" hello"
now why could i not just say"met david beckham on tuesday"
there is always a tangent when people meet our david.