Please extract the names of the 1990s films Adam Sandler was in separating them with commas.

Context: In 1993, Adam Sandler appeared in the film Coneheads with Farley, David Spade, Dan Aykroyd, Phil Hartman, and Jane Curtin. In 1994, he co-starred in Airheads with Brendan Fraser and Steve Buscemi.

Sandler starred in Billy Madison playing a grown man repeating grades 1–12 to earn back his father's respect and the right to inherit his father's multimillion-dollar hotel empire. The film was successful at the box office despite negative reviews. He followed this film with Bulletproof, and the financially successful comedies Happy Gilmore and The Wedding Singer. He was initially cast in the bachelor–party–themed comedy/thriller Very Bad Things but had to back out due to his involvement in The Waterboy, one of his first hits.

Answer: The 1990s films Adam Sandler was in include: Coneheads, Airheads, Billy Madison, Bulletproof, Happy Gilmore, The Wedding Singer, The Waterboy.