InterHigh Counting

Setting: A youth student and his teacher are talking about InterHigh Monthly.

Teacher: How many of your friends are coming to our next InterHigh Monthly?

Student: There's so many I can't count.

Teacher: Oh wow..  but I need to know, so that I can arrange for rides.

Student: Oh, ok...  (pause)  Two.

Teacher:  (pause) Is that two including you?

Student: Yeah.. no wait, no. It's me, my friend J, my friend R and one other guy.

Teacher: ... So that's 4.

Student: It is?