multi-modal communication in action

Today, I am working at a local library, trying to finish up a paper that is much overdue. Then, I received a phone call from my colleague. Since I could no talk in the library, I sent a text message back to him saying that I could not talk to him, asking him to call me later tonight. He then sent me an e-mail back saying that would be fine. Within a span of 2 minutes, we invoked three different communication modes. Perhaps we have too much choices of communication.