One time a taxi driver pulled the "no change" move and so he got an extra 10 baht from me.
At that time, the baht was 42 to the dollar. So,
Its the principle, so I screamed at him in an insane fury, veins bulging, spittle flecking my beard along side the chunks of Pla Ra from my lunch. As is typical of Thai taxi drivers, he groveled before me, so I allowed him to keep his ill gotten gains.
Theives and cowards! Treat them accordingly!