[vimto]

Urinating in public is very unusual and suggest a level of dis-inhibition that 'barley lucid' would sum up. Probably quite a seriously unwell lady.

[Vigilanteman]

"She's got some very serious mental health problems," said Page Kelley, Mrs. Mayo's attorney, who described her client as "just barely lucid."

Wouldn't that describe just about everyone supporting Islamofacism?

[DCPatriot]

There may be more information missing as to why she relieved herself in the aisle.

Maybe she hysterically claimed she had to go to the lavatory and because of justified suspicions she wasn't allowed.

So...she says to herself, "okay, I'll show 'em".

...taking a pi$$ing contest with air marshalls to the limit! ;^)