With jaw to floor

• Feeling wowed
• With reverent dread
• Left open-mouthed
• Admiring, with "of"
• "___ of such a thing . . . ": Shak.
• Amazed by (with ''of'')
• Deeply impressed: 2 wds
• Mighty impressed
• Speechless, perhaps

Wiktionary Word definitions in Wiktionary
vb. (context transitive English) To put in awe or fear; awe; overawe.