LOLLOL I had a skull chest do that one time I was like
'Skulleh Chesteh of Doomeh!'
-walks to edge-
-keeps walking at edge hoping that it would do something-
-skull chest fades away-
-cries in corner-
If you had relatively slow internet (or can configure it to process/accept less information, like I do) you can rapidly click the Notoriety button while running in a corner to get out of the bounds and get that loot pouch/skull