This was posted two days ago on THIS forum...
@Tod ********
replied..
"There is no 'border bounce' for Burmese. They can only enter free stamp for 14 days by air and need a valid visa to enter by land.
They can contact the burmese embassy, get a letter go to the immigration office and apply for a 30 day 'embassy request' extension.
OR
They can go to a thai consulate in a nearby country and buy a visa
OR
they can fly out/back and get a 14 day entry stamp"