I really wish I had've checked in there first.
4 seconds sound clip from the Saw (2004) movie soundboard.
You can hear this line at 00:13:59 in the Blu-ray version of the movie.
Quote context
[...]
- There, right next to you, on the toilet.
- Oh, man!
- I really wish I had've checked in there first.
- Hey. Mind passing me the other one?
- He doesn't want us to cut through our chains. He wants us to cut through our feet.
- I think I may know who's done this to us.
[...]