He keeps a jack and spare tire in the 'trunk'.
a 'trunk' full of clothes
the 'trunk' of an artery
(..) Just where do you suppose he cut her up? Of course. The bathtub. That's the only place where he could have washed away the blood. He better get that trunk out of there before it starts to leak. Harry? Look, look, Mr.Jefferies. I thought Doyle would be here... by the time the trunk left, or I'd have called the police. Now we're gonna lose it. Hold everything. Don't do anything foolish. I'm just gonna get the name (..)1954 Rear Window