Unfortunately, the Germans caught wind of Operation Fishing Boat Bang Bang Explody Pow and were lying in wait. Jan and the others, seeing how fucked they were, lit the fuse on the explosives and tried to escape in a smaller boat; a plan which resulted in them having exactly zero remaining boats (approximately one less than the recommended amount for seafaring adventures).
Jan and his buddies were now in freezing waters and being shot to pieces. They all swam for the coast, but only Jan got away. Because his luck hadn't been shitty enough up to this point, he was immediately shot in the foot upon reaching land. Caught between freezing to death and bleeding to death, Jan also had the Germans behind him. Capture seemed imminent and, quite frankly, preferable.
An otherwise perfect vacation destination ruined by Nazis.
The Awesomeness That Followed:
Recalling the adventurous spirit that had given him the nerve to stuff a fishing boat full of explosives, Jan drew his pistol. When the Germans came within sight, he fired, killing a Gestapo officer leading the chase. Down a boot, shot in the foot, hypothermic and bleeding, he set off on a dead sprint for Sweden (so to speak).
After finding food and temporary shelter from friendly locals, Jan decided to have a gander at his hideous feet. Surprisingly, things didn't look too bad, other than whatever he saw that caused him to slice his own foot open to drain excess blood in a completely ridiculous attempt to stave off infection. Shockingly, carving up his skin with a dirty piece of steel didn't help much.
Surprisingly, this is not the same as a sterilized scalpel.
Sometime later during his escape, Jan had to hide from patrols with what was basically a snow fort for shelter. There he had 18 goddamn frigid days to consider the popsicles his feet had become. At some point, possibly out of sheer boredom, he made the fateful decision to operate with his pocket knife again. This time, however, he started cutting off toes, taking off every digit save one.
Miraculously, this second pocket knife surgery ended up stopping the gangrene threatening to consume Jan's feet, effectively saving them and maybe his life and Jan eventually made it back to Norway. For his self amputation filled efforts, Norway awarded him the St. Olav's Medal, the SIXTH highest honor a Norwegian can receive. Sixth! Real fucking nice.