Be still: While the elevator should be able to take the upper limit fairly easily, this upper limit will be designed assuming that everyone riding will be relatively still while they’re inside. Jumping or otherwise moving around a lot can place extra strain on the elevator and is not recommended.
Be prepared for power failure: Elevators rely on a lot of power in order to operate and without this they would be stuck statically and without light. This is relatively harmless, but can be quite scary for the people inside and particularly if they are claustrophobic or otherwise afraid of lifts. As the owner of the building you should speak with a lift consultant in order to ensure that you have facilities in place for this eventuality. For one you should have a backup generator which can kick in to power at least the lights and possibly the elevator as well in the case of a failure. This way the people inside will be able to carry on towards their destination and at least won’t have to wait in darkness. Furthermore there should be an emergency contact number on the inside of the elevator which can be very useful in a range of situations. If you are in the unfortunate situation of being stuck in an elevator then the secret is not to panic, and to calmly call the number which should be clearly somewhere inside the building.