Originally Posted by
md11mx
Helmets are like bears and BIG G U N S . When you come across one in the woods the last thing you want to say to yourself is "why did I leave it at home."
Bicycle helmets are more like meat cleavers and bears. It's sure better than nothing in case you encounter a bear, but there is no reason to believe it's going to be terribly effective, so it's best to avoid bears altogether.