Just because of normal walking in round wooden table it can not start paining in knee joint. Here you need to clear one thing wether you was walking on your knee or was walking normally on your feet. If it was walking on your knee then it can start paining you due to strain on soft tissue as well as knee joint. I suggest use cold pack and apply some pain relieving ointment for time being for one or two days. Later or in between if you are comfortable and feels good start using hot pack for heat fomentation at painful soft tissue. Most important thing if its paining then do not do much of walking and folding knee activities. Take some rest. It should be all right on its own with body s natural healing capacity. But if it is not becoming well then you need to visit orthopedic doctor as well physiotherapist for proper examination and treatment. You may need to take one x ray of knee joint as well to check no further damage at knee level. I suggest go ahead with proper treatment with orthopedic doctor as per evaluation and if needed take physiotherapy treatment too. Physiotherapy treatment will also help you to reduce soft tissue strain by increasing healing in soft tissue as well it will also help for pain relief. I am sure this will be useful if you follow the advice properly. Take care.