I'm fairly sure we all feel 'sorry' for the PIC, but......
There is a 'check' to be performed prior to landing....??
I think all the flying schools teach their students to say on the before landing check "Undercarriage down and locked" even though it may be a fixed gear type like a 172 or Warrior. That is the folly of teaching students false drills. Of course for the sea plane it would be gear up and locked before landing but bad habits are hard to stop