Matthew 27:51-54 (ESV)
And behold, the curtain of the temple was torn in two, from top to bottom. And the earth shook, and the rocks were split. The tombs also were opened. And many bodies of the saints who had fallen asleep were raised, and coming out of the tombs after his resurrection they went into the holy city and appeared to many. When the centurion and those who were with him, keeping watch over Jesus, saw the earthquake and what took place, they were filled with awe and said, “Truly this was the Son of God!”
A little piece of information that I've never thought too much about before -- when Jesus died, even the DEAD got up to testify that this was the Son of God! Between the miracles, the crowds, the crucifixion, the darkness, the empty tomb, the earthquakes, torn temple curtain, dead folks walking around, Jesus appearing and disappearing, not to mention all the "Acts 2" stuff -- that would have been a crazy couple of months to have witnessed!