Matt. 27:51-53 is probably one of the craziest passages in the Bible:
Then, behold, the veil of the temple was torn in two from top to bottom; and the earth quaked, and the rocks were split, and the graves were opened; and many bodies of the saints who had fallen asleep were raised; and coming out of the graves after His resurrection, they went into the holy city and appeared to many.
Such was the power of Christ’s death and resurrection that not only did the temple veil tear in two and the whole earth quake and rocks split, but many people rose from the dead! Wouldn’t that just be crazy… to see someone who’d been dead for days, weeks, years, decades even, walking around town as if they’d never died?
Google the passage and you’ll find some interesting commentary on it. Some scholars point to it being a fulfillment of Ezekiel’s vision of the valley of dry bones.