Signs, Wonders and Worship?

In Acts, when Peter and John heal the lame man when they go to pray in the temple, it leads to people gathering around to find out what's happened and so creates an opportunity to preach the gospel and many people believe (Acts 3:11-4:4 – in fact, that's when we're told that the church grew to 5000 people). There the sign leads to preaching so that people hear the gospel and get saved. Signs and wonders by themselves don't save, but true signs and wonders draw people's attention to the gospel which does save.
As for worship, our worship is a response to what God has done for us in Christ. So, I get worried sometimes about things that give people the impression that worship is something we do that causes God to act. We don't worship so that God will turn up, we worship because He's already here. What I want to see in worship is people getting a greater grasp of the glory and grace of Jesus, not getting excited about strange things that happen. That's not to say strange things can never happen; sometimes strange things do happen in the Bible, but always with a purpose of pointing people to Christ.
Having what we've heard about happening somewhere else happen with us shouldn't be the goal of our worship - only Jesus should be. So anything that doesn't point us to Jesus is out of place.