Probably just wore it in that morning and suddenly there are lights and cameras all over the place.
What bothers me is that here I am, also adding to the comment-glut on the darned shirt, while still admiring the effort that went into the project. You learn from stuff like that.
Next time around, now that we know that the harpoons don't necessarily work on a body like that, we'll figure something else out. Sorta like getting a flyer when shooting for record. The probe probably hit a weird unexpected surface bump or something and threw it off. Remember how the first manned moon lander had to drift around for a while to find a smooth spot to set down? I still remember the dust being blown around on the moon's surface as it maneuvered.
Good practice anyhow if we ever have to attempt to destroy or deflect a threatening space body.
Terry