"I caught a blur of something coming over the boat … and the pectoral fin of the shark hit me on the forearm and knocked me down on the ground to my hands and knees," the 73-year-old told the Australian Broadcasting Corporation.
The shark measured 9 feet (2.7 m) long—a pretty scary sight, considering Selwood's boat was only 15 feet (4.5 m) long.
After the shark jumped aboard, the fisherman called the local marine rescue unit, who picked him up. They later went back for the boat, where they found the deceased shark.
Selwood treated the whole thing like it was no big deal, even though he got scratched up by the shark's rough skin.
"It won't deter me from fishing, no way in the world," he told the ABC.
"But really, it's not a great story, it's just a mundane thing that just happened and it's over and done with, but something that I'll remember. But we're all well and now I'll just get on with life and repair the damage he made to my boat."
While it's great the fisherman is OK, it's bad news for the great white shark. The species is considered "vulnerable" by the World Wildlife Fund, with decreasing numbers due to being caught by sports fishermen and nets meant for other fish.