Let's go up to the Lab and put "Luke" on the tomb slab. An analysis of "Luke" orthodox ending to use as a base for related Patristic commentary:
41 And while they still disbelieved for joy, and wondered, he said unto them, Have ye here anything to eat?
|42 And they gave him a piece of a broiled fish.||-|
|43 And he took it, and ate before them.||Anti-Marcion. What is the point other than anti Docetic.|
|44 And he said unto them, These are my words which I spake unto you, while I was yet with you, that all things must needs be fulfilled, which are written in the law of Moses, and the prophets, and the psalms, concerning me.||Anti-Marcion. Jewish Bible is source.|
|45 Then opened he their mind, that they might understand the scriptures;||Paul. Revelation is source.|
|46 and he said unto them, Thus it is written, that the Christ should suffer, and rise again from the dead the third day;||Who ever wrote this before besides Paul (1 Corinthians).|
|47 and that repentance and remission of sins should be preached in his name unto all the nations, beginning from Jerusalem.||The likely source for Justin Martyr's related excerpt that is often wrongly claimed as witness for LE. The ending of GMark with the LE implies the send off was from Galilee, not Jerusalem. So we can probably add Justin to evidence for 16:8.|
|48 Ye are witnesses of these things.||-|
|49 And behold, I send forth the promise of my Father upon you: but tarry ye in the city, until ye be clothed with power from on high.||-|
|50 And he led them out until [they were] over against Bethany: and he lifted up his hands, and blessed them.||-|
|51 And it came to pass, while he blessed them, he parted from them, and was carried up into heaven.||MarkNewsonofMan! Note the Marcion parallel to GMark. The Gospel starts with Jesus descending from Heaven and ends with Jesus ascending to heaven.|
|52 And they worshipped him, and returned to Jerusalem with great joy:||-|
|53 and were continually in the temple, blessing God.||-|
And now back to Eusebius commentary on the resurrection sightings...
Skeptical Textual Criticism