Possible Clues:

• "Okay, here goes ..."
• Volunteer's offer
• "Might as well give it a go"
• "OK, here goes ..."
• 'Better give it my best'
• 'Well, here goes …'
• ''Well, here goes . . .''
• ''Here goes nothing!''
• 'No promises'
• 'O.K., here goes ...'