Arthur Grant and his motorbike allegedly collided with a Loch Ness Monster in 1934.

Opinions vary on whether it was an actual sighting or an imagined incident.

Here is what Tony Harmsworth shared today:

This is what I actually say in my book about Grant:

It was not much later that a young veterinary student called Arthur Grant claimed that the monster, with a sheep in its mouth, had run across the road knocking him off his motorcycle before leaping the wall and disappearing into the loch.
There are actually two versions of stories for how this Grant sighting came to the attention of the world. I must admit that they are both believable, but there would seem to be little chance today of actually finding out which is correct.
The version I had heard, from the late Joyce MacDonald of Drumnadrochit, was that Grant had fallen off his motorbike near what is now the Abriachan nursery and when he arrived home his mother asked how he had damaged his motorbike. Grant came up with the story that he had been knocked off the bike by the monster.
A friend of his, possibly many years later, told Joyce’s husband, Willie MacDonald that he had overheard the story and told a journalist. The account then appeared in the newspapers.
Today we have no way of discovering who that friend was.
A more recent version which I heard from Dick Raynor was that Arthur Grant and a friend were calling the newspapers themselves from a telephone at a local garage owned by Alec Menzies who had overheard one end of the conversation and also heard Grant turn to his friend after the call and say, “They’ve swallowed it.”.
Whichever was true I hope the reader will accept that neither Grant nor Spicer really saw any large unknown animal. In the defence of Spicer, Adrian Shine believes that they may have seen an otter or some deer distorted by a mirage beyond the hot tarmac on the brow of a hill.
Maybe so, but I feel that it is far more likely to have just been a joke.