They go off on tangents.
They start coffin.
You will see one later and one in a while.
Math teachers, because every student counts.
A: They are the only ones who erase their notebook when the teacher erases the board.
I have no idea, but this looks like a good joke. So post your proposals in comments.
Timing
A vicious circle.
Geometry.
You always end up going off onto tangents.
A tangent
