Impulsive is an unofficial Sam & Max text adventure by Shwoo. It was made as an entry for Telltale's 2009 Halloween contest.
Sam and Max are driving around on Halloween night when they suddenly run out of gas. They go into an old house nearby for help, then get trapped inside just as they try to leave.
Inside they meet a ghostly woman who explains she got them stranded here as she needs their help to get four life pieces back and move on. After they do, the ghost turns out to be evil and tries to kill them. They manage to get rid of her through trickery, after which the house starts to collapse and they're free.