An interventionist and an ethnographer walk into a bar

This isn't a joke, it really happened last night.

An interventionist and an ethnographer walk into the bar, the interventionist says, "I could not do ethnography! All they do is sit there and observe. They just listen. They can't say or do anything! I can't do that. I have to be like, 'No! You are wrong!'

Wide-eyed and close-lipped, the ethnographer responds, "Hmmm. Interesting. Tell me more."