If you are at a business establishment, such as a grocery store or a restaurant, they owe you a duty to maintain their property in a reasonably safe condition and a duty to warn of any known, hidden dangers. To comply with this duty and protect their customers, business establishments should check every so often for foreign substances and other dangerous conditions that can cause you, the customer, to get injured. These can be very difficult cases because the law tends to favor the business establishment. Because of the nature of these cases, they can result in very significant knee, back, spine, and shoulder injuries, many of which end up being surgical. Do not delay hiring an injury attorney to assist you with your slip/trip and fall claim.