Throwing stuff in the pool is not really a good idea. Some people do it, but you may want to be aware of the dangers of doing so. Say you have a 30 pound lawn chair, you throw it in the pool. You should really lower it into the pool, and keep a hold on it till it hits the bottom. If you drop that chair in, and let go, it could sink to fast and crack the lining of the pool. If it gets a crack, the water would start draining slowly and you would have to get it repaired. Repairing the lining is not a cheep or fast job, they need to drain all the water, chisel out the area around the crack, replace the beding as it will have most likely liquified or collapsed, then repour the concrete, reapply the lining, then redo the diamond brite or other coating, then kill your waterbill to refill it.

I would say follow this one at your own risk, it works if done right, but be aware that if your not extremely carefull it can cause chaos. Also be aware that insurance companies know about this completely, so if you try to claim a cracked pool lining, they will deny the claim.