ESL student humor

I love my students.  My morning class is a comfortable size now.  Five students are regular attenders.

This morning, I was teaching a grammar lesson on when we use "too" and when we use "enough" and where each word is placed in the sentence.  For example, "too" is placed before an adjective, but "enough" is placed after an adjective but before a noun.  I started my lesson by holding up the student book and saying, "Class, what would you say if I told you we need to read this entire book tonight?"  I was hoping to elicit responses such as, "It's too long" or "It's not enough time" to then show the students that they already use this construct.  However, my students once again surprised me.  In response to my question, one student raised her hand and said, "Teacher, I can't come to class tomorrow!"  I'm still chuckling!