Kaboom! (breakfast cereal)

Kaboom! is the name of a vitamin fortified, circus-themed breakfast cereal produced by General Mills, which contains fruity-flavoured corn cereal bits shaped like smiling clown faces and marshmallow bears, lions, elephants, and stars. Its mascot is a smiling circus clown. It originated in 1969.

Although known as a breakfast cereal of the 1970s and 1980s, Kaboom! remains available for sale as of 2007. It can be purchased, for instance, from Amazon.com here

Appearances
Quentin Tarantino's 2003 movie Kill Bill Vol. 1 included a scene in which character Vernita Green pulls a weapon out of a box of Kaboom! cereal in an attempt to eliminate The Bride. A box also appears as a focal point in the Butthole Surfers' video for their song "Cherub".

Kaboom cereal turned the milk in your bowl a strange greyish blue color, and, to put it delicately, blue in-blue out.