Possible Clues:

• To be pessimistic, a pair needs breather, being out of energy
• A source of trouble to overcome, taking a pessimistic view
• A pair lie without energy, being pessimistic
• In the most negative circumstances
• If all else fails at holding R&R?
• Taking the most pessimistic view
• On one extreme
• In the event of the utmost calamity a couple are reportedly stumped
• A small number run onto street in the most serious state
• To be pessimistic, a couple have to relax, after losing energy