Weiner began his career as an artist as a very young man at the height of Abstract Expressionism. His debut public work/exhibition was at the age of 19, with what he called "Cratering Piece". An action piece, the work consisted of explosives set to ignite simultaneously in the four corners of a field in Marin County, California. That work, as Weiner later developed his practice as a painter, became an epiphany for the turning point in his career. His work in the early 1960s included six years of making explosions in the landscape of California to create craters as individual sculptures. He is also known during his early work for creating gestures described in simple statements leading to the ambiguity of whether the artwork was the gesture or the statement describing the gesture: e.g."Two minutes of spray paint directly on the floor.." or " A 36" x 36" removal of lathing or support wall ..." (both 1968). In 1968, when Sol LeWitt came up with his "Paragraphs on Conceptual Art", Weiner formulated his "Declaration of Intent" (1968):