LaFontaine lent his distinctive voice to thousands of movie trailers during his career, spanning every genre from every major film studio, including The Cannon Group, for which he voiced one of their logos (he also voiced the Viacom closing logo in 1990, simply saying the company's name after it had been formed on the screen). For a time, LaFontaine had a near-monopoly on movie trailer voiceovers. Some notable trailers which LaFontaine highlighted in the intro on his official website include: "", "Shrek", "Friday the 13th", "Law & Order" and "Batman Returns". LaFontaine stated in 2007 that his favorite work in a movie trailer was for the biographical film "The Elephant Man", though according to a response to the question on his website, he had several trailers which stood out in his mind, and he didn't like to choose one.