Possible Clues:

• 'I'm glad that's over!'
• Comment after a close call
• Pooh starts to pig honey -- Eeyore's wide-eyed
• What a relief! It's hot!
• Exclamation after a workout
• Exclamation of relief not many heard
• 'Boy, that was close!'
• Sound relieved to have page cut
• Power cut that was close
• Not many uttered expression of relief