In the Church, there are preserved a number of consecrated hosts that once bled. I have a video that shows the one preserved in Venezuela actually on fire, taken by a pilgrim.
When I was on a pilgrimage to the Holy Land, a Franciscan brother told our group just before Mass an incident what just happened in another church. A gunman entered that church, ordered the only person, an old nun, present at the time to get out and started shooting. He shot at the various statues and finally put a bullet through the tabernacle. After the crazy man left, the main concern were not the statues, but the consecrated hosts in the tabernacle. (A host is the consecrated wafer of the Eucharist.) After the tabernacle had been opened, not only the cup that held the hosts was intact, but also the bullet that pierced the tabernacle was nowhere to be found ~ it had vanished! The Lord certainly knew how to take care of himself.
On another pilgrimage, our group was visiting a beautiful chapel built by former drug addicts who were cured through prayer and physical labor. We heard some testimonies first. Then one priest present was asked to bless the Holy Eucharist. So the priest brought out the cup filled with consecrated hosts from the tabernacle, turned around and started lifting the cup high for all to worship and adore. At the precise moment the cup reached the highest point, we had an earthquake and the whole chapel shook for about two to three seconds. It's an awesome moment I'll never forget. It seemed that the Lord was telling us that He is indeed the Lord.
Of course, nonbelievers can always say that this was just a coincidence. Well, nothing in the world can happen without God's permission and the timing of God is always perfect. Coincidences are all planned by God with him remaining anonymous.