Possible Clues:

• They last a very short time
• Border secured in record time, but it won't last
• Pamphlets, postcards and such
• Musical work (with change of vocal lead) about limit in short-term stuff
• Highly transient things
• See them heading off in record time -- they won't last long
• Things of passing interest in European article about odd MP here
• Flipping hard exercises: Nutmeg's in time and they don't last long
• Mayfly - something short-lived