Late '66 heading West on I-90 crossing the Columbia River at Vantage. I don't know how strong the wind was, don't care. The wind moved me across both lanes almost into the middle divider so quickly that I didn't even react until afterwards. Had the shakes so bad that I could hardly control the 305 Super Hawk I was riding. I stopped in Vantage at the little cafe and stayed put until the wind died down later in the afternoon. I've never heard any mention of the effects of sudden gusts of wind in any MSF class I have taken. It is mentioned in a number of books but never in a class.