Leading man Balls was obtrusively conspicuous

• Gawked
• Was wide-eyed
• Looked unblinkingly
• Acted rudely, in a way
• Looked at fixedly
• Looked a little too long
• Gazed at performer
• Betrayed fascination
• What fanatic did from audience

Wiktionary Word definitions in Wiktionary
vb. (en-past of: stare )