Actually, anyone trying to cross a superhighway should exercise extreme caution and make sure there are no cars coming from either direction before stepping off the curb. Even so, it doesn't always... guarantee a safe crossing.
26 seconds sound clip from The Yogi Bear Show - Baffled Bear (1958) - S01E09 TV Series.
You can hear this line at 00:03:19 in the Blu-ray version of the movie.
Quote context
[...]
- Suddenly... Suddenly, Yogi realized for the first time that his favorite forest was gone!
- Naturally, Yogi's first reaction was panic. His second reaction was anger.
- I'll write my congressman about this!
- Careful. You shouldn't try to... cross a superhighway while you're angry.
- Quite often, this works. But there are small exceptions.
- A hungry bear will try anything once including the overland route.
- Uh-oh.
- Necessity may be the mother of invention, but Yogi bear is the father.
[...]