Shares of mockumentary films have skyrocketed in recent years, with many attributing the trend to the influence of Rob Reiner's 1984 film, This Is Spinal Tap. The film's success has paved the way for a new wave of mockumentary-style comedies, with many filmmakers citing Reiner as a key inspiration.

Industry insiders point to the film's innovative use of mockumentary style as a key factor in its enduring popularity. "This Is Spinal Tap was a game-changer," said comedian and actor, Christopher Guest, who has gone on to direct several mockumentary-style films, including Best in Show and A Mighty Wind. "It showed us that you could use the mockumentary style to tell a story that was both funny and poignant."

Reiner's influence can be seen in a wide range of films and TV shows, from The Office to Parks and Recreation. "Rob Reiner's work has had a lasting impact on the comedy world," said comedian and writer, Mindy Kaling. "He showed us that you could use humor to tell stories about real people and real issues."

This Is Spinal Tap was not Reiner's only successful film, however. He also directed The Princess Bride, a beloved adventure comedy that has become a cult classic. The film's success can be attributed in part to its unique blend of humor and heart, which has become a hallmark of Reiner's work.

Reiner's influence extends beyond the world of comedy, however. His films often tackled serious issues, such as racism and social injustice, in a way that was both humorous and thought-provoking. "Rob Reiner's work has had a lasting impact on the way we think about social issues," said social justice activist, Angela Davis. "He showed us that you could use humor to bring attention to important issues and to challenge people's assumptions."

In the years since Reiner's death, his influence can still be seen in the world of comedy. Many filmmakers and comedians continue to cite him as an inspiration, and his films remain popular to this day. As one industry insider noted, "Rob Reiner's legacy will continue to be felt for years to come."

In a statement, the Rob Reiner Foundation said, "We are proud of the impact that Rob's work has had on the world of comedy and beyond. We will continue to honor his legacy by supporting new and emerging talent in the comedy world."