Serena Versus the Drones

Serena Versus the Drones

(alt-text)

After the test, she said that if she had a choice, she wouldn’t defend herself against drones using a tennis ball and racket, though she would absolutely pick them over other sports equipment. But, she added, "Drones don't bother me."

See also: https://blog.xkcd.com/?p=922

Special 10th anniversary edition of WHAT IF?—revised and annotated with brand-new illustrations and answers to important questions you never thought to ask—out now. Order it here!