Possible Clues:

• In a crawling position
• Crawling, say
• Searching on the ground floor as unlawful?
• Everyone sheltered by sunroof moved using their hands and knees
• Cricket side scoring boundaries only, apparently at a crawl
• Retro plain squares under the table, perhaps?
• Maybe crawling from south of plain, bear with a cut
• Legside boundaries keeping everyone in a defensive position
• Left quartet in riotous salon crawling about
• Everyone inside charged to boundaries, keeping down