INTPs and ADD
"Occasionally, a teacher will let fall a fleck of gold dust that attracts an INTP's immediate attention. While the teacher goes on explaining something else, the INTP picks up the gold dust and examines it. Ten minutes later, the teacher is still talking but the INTP hasn't heard a word of it because they were so busy thinking about the new idea the teacher sparked." Not just teachers—this happens to me All. The. Time.