Passenger's bizarre use of drinking glass on flight leaves travelers horrified

Leaving his fellow travelers mortified, an EVA Air business-class passenger was caught on video using a drinking glass to scratch his scalp mid-flight. An etiquette expert weighed in.

Leaving his fellow travelers mortified, an EVA Air business-class passenger was caught on video using a drinking glass to scratch his scalp mid-flight. An etiquette expert weighed in.