Most pastors preach or speak in a public forum 150 to 200 times a year. Many do more than that. Over time these preachers have the ability to discern if the congregation or audience is following them or if their minds are in another world.
Preachers are also too familiar with distractions. While it's the way of life of someone who gets in front of people to speak, it is no less annoying.
I asked a number of pastors to share with me the most frequent distractions they experience while preaching. Here are there responses in order of frequency. I also took a representative quote from one of the respondents for each item.