So you've got hills and offices all around, and a stretch of beach in the middle. Are the people in the water or on the beach - if they're in the water they've got less chance of hearing you and you've got less chance of seeing them.
If there's that few of them on the beach, you should be able to miss them. If there's that many of them, they should see you coming and clear a perfect path just like all the Hollywood stunt men and women do!
How exactly are you going to sacrifice one life to save another. If you mean sacrifice one beach goer to save yours, you've miss judged it. You won't miss them and kill yourself, you'll probably just die trying, and still wipe them out.
