Popular gun safe can be opened by knocking it gently on its corner

I post the Lockpicking Lawyer so frequently I decided not to do so again until he opened something by hitting it. This he has in fact done, it turns out: a fancy $150 gun safe so unsafe I won't even name or link to it here.

I will not be posting the Lockpicking Lawyer again until he opens something by looking at it sternly.