Possible Clues:

• Banned, as might be retired trampolinist?
• Not to be approached -- like exhausted kangaroo?
• Off-limits, like a tired jumper?
• Like a tired kangaroo in forbidden territory?
• Skipper so exhausted lying beyond field of play?
• Prohibited
• Like a dead kangaroo that shouldn't be approached?
• Off limits, like an exhausted kangaroo?
• "No-go", like an exhausted Tigger?
• Like a tired kangaroo beyond the pale