St Peter denies Christ (Luke 22:54-62)
After Jesus was arrested, Peter denied knowing him three times. As Jesus had predicted, a cock then crew.
Moses at the Burning Bush (Exodus 3:1-15)
Moses was tending to his father-in-law's flock in the desert when he saw a burning bush that was not consumed by the fire. From within the bush, God spoke to Moses and called him to lead the Israelites out of slavery in Egypt.