Talking to Fox News Lloyd said she was "perplexed" at first and grew even more concerned as the cabin crew member continued to roll around for "a solid 10 minutes".
"I think she was doing it to try and be funny and make the passengers laugh," she reasoned.
Mortified, few passengers seemed to see the funny side. Instead they scuttled to their allotted seats and pretended not to see.
Eventually freeing herself from the bin the air steward seemed perfectly nice - if a little embarrassed - for the rest of the flight.
It appears this bizarre incident was a misjudged joke.
Southwest issued a statement to Fox News regarding the event, saying that their employees are known for their sense of humour and the steward would not be disciplined.
"Southwest employees are known for demonstrating their sense of humour and unique personalities. In this instance, one of our flight attendants attempted to have a brief moment of fun with customers during boarding.
"Of course, this is not our normal procedure, and Southwest crews always maintain safety as their top priority."