"Just as he was speaking, the rooster crowed." A line from the personal story of a man named Peter.
The God who controls both rocks and roosters also knows your name!
The story with Peter wasn't as much about his denial, as it was a demonstration of God's overriding providence during our greatest moments of human weakness.
Pentecost was both a celebration of Peter's personal transformation and the fulfillment of Joel's prophecy. Personal stories are just as important as prophecy with this God who knows the number of hairs on your head.