Pushing a wheelchair is not really as easy as it looks. Before \_41\_ out, you have to make sure that the rider is situated well in the seat of the wheelchair, so that the balance is kept steady during the ride. Also, her legs have to be firmly placed on the footrests so that her feet will not \_42\_ on the ground. Then, before going forward, the brakes on the wheels have to be released. While en route, there are also many things to watch out for. You should never go too fast \_43\_ bumps appear in your path. Maybe a teenager will suddenly stop in front of you to tie his tennis \_44\_ laces or a young toddler will wander into your pathway, and you will have to come to a \_45\_ stop. If you are careful enough, you and the rider will arrive at your destination without any mishaps.