As Gideon prepares food for this special visitor, He is hoping that it will somehow be received as an offering. It is consumed by fire at the end of the angel's staff (Judges 6:19-21). The angel disappears (Judges 6:22) and then Gideon proclaims (Judges 6:22-23) who he really encountered.

"When Gideon realized that it was the angel of the LORD, he exclaimed, "Ah, Sovereign LORD! I have seen the angel of the LORD face to face!" But the LORD said to him, "Peace! Do not be afraid. You are not going to die."

In fact, Gideon was so impressed with the visitation that the next verse says he made an altar unto the Lord right there. "So Gideon built an altar to the LORD there and called it The LORD is Peace." (Judges 6:24)

Take Away:
 Here is the catch (similar to the previous Message From Gideon) - Gideon recognized The Lord after the miracle of consumption and the Lord's disappearing.  Notice that Gideon was afraid of dying because of seeing God face-to-face.  Also, observe the Lord did not correct him about seeing Him (as opposed to seeing another angel), the Lord simply told Gideon, "Peace! Do not be afraid. You are not going to die."  This proves that this was indeed the pre-incarnate Christ in the literary form of The Angel of the Lord.

We need to be observant enough in our life to recognize God visiting in the moment.  God may need to speak to your heart.  A praise session might be in order for that time.  We don't have to make some grand proclamation or build an altar, but we need to be sensitive to His presence so that we Honor Him when He manifests His presence strongly in our lives.  We can confide in a special someone and tell them about our time with God. We can also journal the experience.  But don't miss Him and don't forget the experience (memorialize it).