A common mistake of those making introductions is to hit the ‘punchline’ too quickly. When the “heeeeere’s Johnny” (did I just date myself?) gets uttered, the audience goes into applause mode, and the introducer’s job is over. Or at least it should be.A common mistake — prevalent at many/most Toastmaster’s meetings — is to try to continue to make a point after giving what sounds to the audience like the final salvo of an introduction. Many presenters will try to talk over the din of the applause to make that final point. It is rarely received. Others will wait for the applause to die down to make that final point. The problem here is that the audience is in speaker mode and resents being kept on the hook by the introducer.
End introductions cleanly with a clear transfer to the speaker. (Then sit down).