After botner raised my club overcall I probed for 3nt with 3♥. Botner raised to 4♥ and I then discovered that I had promised a four card ♥ suit. Botner could have 5♥ but I retreated to the safety of 5♣ whereupon partner corrected to 5♥, clearly showing a strong 5+ heart suit.
Imagine my surprise when botner tabled the 753 of ♥.