Illya Kuryakin was generally an exceptionally good pick-pocket. It was a rare indeed for him to be noticed so, when he lifted the plans for a Thrush plot from the pocket of a courier, he was quite surprised to be caught out by the man. Without a second thought, Illya turned on his heels and sprinted away; with the Thrushie in hot pursuit.
Although it was evening, there were still many people visiting the Tatsumaki Jigoku, 'Spout Hell', one of the 'Hells of Beppu'. The town of Beppu, in Japan, was home to eight hot springs. Each had different characteristics from the others, with Tatsumaki Jigoku featuring a boiling hot geyser, which erupted every thirty or forty minutes.
As he ran, Illya was continually checking over his shoulder for his pursuer so almost failed to notice the spring. At the last moment, he became all too aware of it and only just prevented himself from going over the edge. The Thrushie wasn't so lucky.
The man tried to stop, but momentum carried him over, yelling in terror, into the boiling spring. He hit the water just as the geyser erupted. Some of the people around Illya began to scream, knowing the man wouldn't survive. The agent calmly peered over the edge.
"Sayonara," he muttered, matter-of-factly, as he tucked the plans in his pocket, before walking away.