Journeyed to Savannakhet Laos the day before my permission to stay expired, via minivan.
Got stamped out of Thailand with the officer warning I was out of visa and should hit up the consulate.
Got a Lao visa on arrival, $40USD, paid in baht the equivalent - seemed to be correct amount based on current exchange rate.
Then hit up the farmer's market for a few items, drove around, etc.
Stamped out of Laos no issues.
On the Thai side of the river was asked if I had a visa, said no, was sent to the other side of the road, was handed a TM6 to fill out (!!).
Then back to the main booth, handed in passport + TM6.
I thought maybe I had won a somtam door prize or something based on the mad pounding/stamping which ensued.
Yep, the Thai folks who had arrived in the meantime were not amused...
But all in, no issues or surprises - except the TM6. Has the W30 stamp on it and stapled in my passport mostly covering the expiring 'stay' stamp.