[2] In the late 1990s, she translated her athletic career into one as an actress and stunt performer for film and television.

[6] In 1978, she was the first athlete, male or female, to win all three trampoline events in the US National Championships.

While attended UL Lafayette, Hennessy was a five-time National Amateur Athletic Union (AAU) All-American for trampoline, from 1976 to 1980.

In August 2007, Hennessy was inducted into the USA Gymnastics Hall of Fame in recognition of her trampoline achievements.

Among her list of credits includes performing stunts for Demi Moore as her stunt double in GI Jane (1997),[5] performing 90-foot high-falls for Lucy Liu in both Charlie's Angels movies (2000, 2003) and, she shared the opening scenes of The Guardian (2006) with Kevin Costner, in which she played the role of the drowning wife.