Paul stands trial before Felix the Governor, and gives his defense. Felix began to be very interested in what Paul was saying, and even brought his wife in to potentially fact check Paul’s argument. But all of a sudden, when Paul’s defense turned into sharing the gospel to Felix, the conviction was too much. Felix bailed, said, "I’ll be in touch later, maybe," and two years later, he is out the door leaving Paul in prison for the next Governor to deal with, never having professed faith in Christ.
Jesus had promised his Holy Spirit will come on the disciples, then he ascended, and now the disciples head back to Jerusalem to wait. What do you tend to do when you have to wait? These 120 disciples waited by praying and making a major decision about who replaces Judas.