And there followed him a certain young man, having a linen cloth cast about [his] naked [body]; and the young men laid hold on him:
Note 5 at Mr 14:51: Mark was the only writer to mention this young man who was clothed with this linen cloth. The relevance of this instance to the betrayal and arrest of Jesus is unclear. This has caused many to speculate that this young man was none other than the writer, Mark, and that he was indirectly referring to himself in the same way that John did in his Gospel (see Life for Today Study Bible Notes, Introduction to John).
This instance of the crowd laying hands on the young man does serve to illustrate how this mob might have treated the disciples if they had not fled.