Summary
Two people face each other and speak to each other (as themselves, this is not a scene). One of them begins speaking and says something to the other (like “I like your shirt”). The other agrees enthusiastically, agreeing with both physical (nodding) and saying “Yes, yes, I like my shirt too!”, overlapping the other person (yes, you can speak over them).
Example
1 - I like my shirt! It has stripes 2 - Yes, stripes, stripes! They are like a tiger! 1 - Yes, Tigers rule! I love the zoo! 2 - Zoos are great! Lets go to the zoo! 1 - Yes Yes! Lets go now! We can take my car!