VIDEOS:
The Vessel
Here we see that if Sam tries ignoring the vessel box without opening it, it "stalks" him, inexplicably appearing nearby.
Example of:
Clingy MacGuffin
His Majesty Martin
Example of:
A Child Shall Lead Them
The Ring
Example of:
Clingy MacGuffin
The Omnitrix
Example of:
Clingy MacGuffin