Toy that pops up unexpectedly.

In quantum mechanics, the particle in a box model (also known as the infinite potential well or the infinite square well) describes the movement of a free particle in a small space surrounded by impenetrable barriers.

"Dick in a Box" is a song by the American comedy group The Lonely Island featuring American singer-songwriter Justin Timberlake.

a British band founded in 1985.

Radio-in-a-box is a portable, economical broadcasting system containing a laptop, mixer, CD/Cassette player, digital audio recorder, microphones and equipment needed to establish a radio station in remote or disaster locations.

(sometimes printed as If I Die In A Combat Zone or incorrectly as If I Die in a Combat Zone, Box Me Up and Send Me Home) an autobiographical account of Tim O'Brien's tour of duty in the Vietnam War.