Ducking Down When Walking Between Two People
You’ll see the majority of Thais duck down slightly when passing in front of two people engaged in conversation. It’s a polite gesture of respect to acknowledge the interruption. The same applies if you walk past a person and block out their vision for a split second.
This list is a fairly brief overview, and there’s a ton of other customs and traditions out there. There’s also likely to be variations and completely different customs found as you travel between regions. Please feel free to share those you’ve come across in the comments section.