Again he began to teach beside the sea. Such a very large crowd gathered around him that he got into a boat on the sea and sat there, while the whole crowd was beside the sea on the land. —Mark 4.1
Mark is famous for useless details like this. He “sat there”? Seems to imply an eyewitness dimension.
And leaving the crowd behind, they took him with them in the boat, just as he was. Other boats were with him. —Mark 4.36
Another useless detail implying eyewitness sources here. Peter?
[After raising a little girl from the dead,] He strictly ordered them that no one should know this, and told them to give her something to eat. —Mark 5.4
Haha. another useless, funny detail hinting at this coming from an eyewitness. That is so funny. Reminds me of the statement early on in Mark about how after fasting for 40 days, Jesus was hungry.
Then he ordered them to get all the people to sit down in groups on the green grass. —Mark.6.39
A certain young man was following him, wearing nothing but a linen cloth. They caught hold of him, 52 but he left the linen cloth and ran off naked. —Mark 14.51-52