Seems harmless but it strongly affects the Feng Shui of a space. In Lay man's term, a sharp corner is as good as having a poison arrow pointing to where you are.
Its meaning and effect may vary depending on its location.
If pointed at your bed, you end up having a hard time sleeping, may feel restless and may also cause relationship issues with spouse or significant someone.
If pointed at your workplace, difficulty getting focused, inability or continuous challenges to get things done which may then resort to financial difficulties.
If pointed at your stove, poisoned arrow on your stove will cause health issues and financial difficulties.
Image 2 is an example image shows a room with numerous Sha Chi. Guess how many Sha chi it has and I'll share the answer next week!