"Then the Spirit lifted me up, and I heard behind me a loud rumbling sound - May the glory of the Lord be praised in his dwelling place! - the sound of the wings of the living creatures brushing against each other and the sound of the wheels beside them, a loud rumbling sound." NIV translation
Ezekiel begins to describe what happened next but he broke out in praise as God was behind him and on the move. As a Christian, you may know the feeling of knowing that God is with you and in control and many times that can just cause us to break out in worship as we meditate on that fact. When God is really moving in your life, worship is a natural reaction to that presence (glory).
"The Spirit then lifted me up and took me away, and I went in bitterness and in the anger of my spirit, with the strong hand of the Lord upon me. I came to the exiles who lived at Tel Abib near the Kebar River. And there, where they were living, I sat among them for seven days - overwhelmed." NIV translation
The Spirit of God took Ezekiel and placed him at Tel Abib where he was to share the message. The prophet is honest as he tells us that he didn't want to go and in fact was bitter and angry in his spirit. He had forgotten that falling on your face in worship of God is good but God is also worshiped when we obediently go and do what He has for us to do. Then, he tells us that for seven days he simply sat among the people in shock.
God tells the prophet that he is a watchman for the house of Israel. This is talking about the fact that the cities had men stationed on top of the walls to watch for approaching danger. The job of the watchman was to alert the people so that they would be ready to defend themselves and not be destroyed. Likewise, Ezekiel is to listen and give the warning to God's people so that they might be saved.
Although we do not have many walled cities today, this is much like the lifeguards that we have at beaches and pools. These people are trusted to keep people safe and warn them of approaching dangers such as rip currents and sharks. We, too, are called to sound the alarm and warn our fellow man that danger is coming in the form of judgment for sin.