It happened to him after he drank water when he was at a funeral.
8 seconds sound clip from the Drunken Dragon movie soundboard.
You can hear this line at 00:20:22 in the DVD version of the movie.
Quote context
[...]
- Ohh, we'll have some noodles instead!
- Doggy, did you prescribe her medicine?
- I followed the book exactly!
- Granny, leave brother Doggy out of it!
- It happened to him after he drank water when he was at a funeral.
- What's that? He drank spirit water?
- It's a lethal drug. Used by frontier people.
- It can control a man's mind completely. And his body.
- Oh? He'll be useful as a scarecrow!
[...]