An action that involves two individuals, the "thirsty Hunchback" and the "Bell".
The Hunchback carries a large bottle and a glass with the liquid. Water works, but other liquids are also allowed. The Hunchback approaches the Bell (preferably a penis bearer).
When the trap snaps, the Hunchback splashes the liquid into the Bell's eyes and rings their "bells" by smashing their balls with the bottle from below.
"I thought she was just having a drink when she blind belled me..."