Warning Board Sign in the alley

Warning board is used to be really strict and using formal language. But this is different. In one alley near my home they used a funny words.

If we can see on the top left corner of this photo there is a sign board with text: NGEBUT BENJOLL!
The meaning of that words is that if you attempt to accelerate your motorcycle more than the normal speed ethically allowed in the alley than you must be close to getting bruised/bump/lump (it means that really danger to speeding in the alley, you can get accident).
This sign board is in purpose to warn every motorcycle rider to slow down the motorcycle whenever they get crossed the alley.
Ngebut benjoll in Indonesian Language is not formal language...more to funny but still serious.
Other interesting:
We can see a mature lady caring basket full of bottle. The lady is a "JAMU" seller. Jamu is traditional herbal drink from Indonesia.The herbal drink in some cases or formula can cure illness or unhealthy body.
Related video with JAMU: