They say if you put things on a slide, seven things to be exact, that’s the best way to consign goods to someone. They say if you consign seven things to someone, you should send them over on a slide. Slide ‘em on down. All seven of ‘em.
One of the seven things you consign over to this guy is a tack (たく). It’s the sharpest tack you’ve ever seen. You slide the tack down the slide. Good thing no one is on the slide now, sitting on that tack would hurt.