Closest class scores

Suppose you are given a table containing students and their corresponding test scores:

Table: class_scores

student_id	name	score
1	John	95
2	Christy	98
3	Rita	87
4	Gilberto	55
5	Perry	80
6	Darlene	72
7	Raquel	68
8	Chris	88

Using the table, write a SQL query to return the two students with the closest test scores (absolute value).

You can view/query these tables in an interactive SQL fiddle here.