a teenager confidently runs at full speed toward the pool while looking back at friends instead of watching ahead. He's about to leap into what's clearly the shallow end where other people are standing waist-deep in water. The "SHALLOW END" marking is clearly visible on the pool deck, but he's completely ignoring it. His friends behind him are frantically waving their arms and shouting warnings with worried expressions. Other swimmers in the shallow water look up with alarm and are quickly moving out of the way. someone making a decision that lacks wisdom and good sense