For a toolmaker, the hammer. For a user, the nailgun.
Also, there's a qualitative difference between physical tools and programming languages. The design of a physical tool can only lessen the likelihood of an accident and/or the seriousness of its consequences, but never entirely rule them out - that's why they're called “accidents”. On the other hand, programming languages can be designed to treat logical errors as invalid code. A program that doesn't compile is completely guaranteed not to corrupt your data, reveal your passwords to hackers, etc.