Possible Clues:

• Blabbed
• Things got off to a bad start when one trainee tripped and ..
• Told ... and a hint to this puzzle's six sets of circles
• Blabbed to a diner cook?
• Divulged indiscreetly
• Let the cat out of the bag, as he bent
• Let the cat out of the bag
• The chuckwagon cook ___
• Revealed privileged information
• The talkative coffee shop worker ...