Not technically a Visa question it's more of a question about entry into Thailand. I have a US passport, and right now we have a 60 day stay visa exemption (unless it changes again soon). I want to know if during my 60 day stay what happens if I decide to visit Vietnam or another country in ASEAN and immediately return to Thailand. Do I ask immigration for a reentry permit or would I start my visa exemption status all over again effective with the newest day of entry into the Kingdom?