Go in. Ask to try the nike shoes on and run out as soon as they turn to assist another customer. It's free or your a thief. Depends on how you look at it.
It may not be possible to get everything in free that too Nike shoes because they are branded and costly too. I suggest you to buy them in online stores by making use of the coupons available to buy them using discounts available at https://www.couponzeta.in/nike-coupons