The one time I took a bad on on the rocks (here on LI, not the Canal) I had the presence of mind to raise my rod over my head and take the full impact on my ribs
I tell people they're better off climbing up to the service road and breaking off there. Just something to consider for the future
Hate to say it, but the 120 1M won't survive a major impact with a rock, either. Can't beat glass for the rocks. SB 121 3M would be my choice.