Related Clues:

• Super-impressed
• Knocked silly
• Overcome, in a way
• With mouth hanging open in shock
• Dropped jaws
• Catching flies, so to speak
• Open a fresh page
• Amazed to be united under America's leader
• Open with incredulity
• Floored or frightened
• Threw for a loop
• Stricken with reverential fear
• Stare in wonder after a religious feast
• Acting on day lost for words
• Wide open space in hospital department