I'll have to look up quantum tunneling, I'm not exactly sure what that is. I was just commenting based on the physics of the droplet bouncing on the pool. It appears that as the droplet rises above the pool and the pool is rippling. As the droplet falls it can hit the ripple of the pool on it's up slope, down slope or when it is flat. If it hits on the slope it will cause the droplet to bounce sideways. If it hits on the flat the droplet should rise perpendicular to the pool. Maybe that is explained by quantum tunneling, I do some reading on it. I find it interesting. Also I watched the third video and I don't exactly understand how the interference pattern is created. Especially if the particle can only go through one of the slits, how can it interfere with itself. Thank you for the response.