  Getting through the obstacles was easy enough considering they opened up to him. The Devils Snare gave him an easy path, the key came to his hands instantly, the chess pieces moved away and the, now revived troll let him pass without problem. However Harry decided to find out how long the potion lasted by jumping through the flames without taking a drop of the potion and came to the other side unharmed. It seemed the potion effects would stay with him for awhile. The potion was probably also why the other traps let his fly through without any sort of problem.