Hehe I always have these things. I always do easy things the hard way.
Remember the first dungeon in Ocarina of Time?? There is somewhere a long rotating bar with spikes on it. Under it is water. On the water, a raft floats from this side to the other.
The bar throws you off when you stand on the raft. So me and my bro figured "You have to jump over it!". So we kept trying a back flip over it. And it worked after 5 tries.
Only later we discover there's a switch to lower the water...
I'll come up with some more.