First-person POV emergency training simulation. The viewer stands on a snowy riverbank and ignor...

First-person POV emergency training simulation. The viewer stands on a snowy riverbank and ignores the safe path. The viewer slowly steps onto the frozen river. The movement is realistic and continuous. The camera keeps the same height and perspective. The viewer walks carefully several meters across the ice. At first the ice looks stable. Small cracks begin appearing under the feet. The cracking sound becomes louder. The cracks slowly spread across the ice surface. The viewer stops and looks down at the dangerous ice. The ice bends slightly and becomes unstable. Dark water becomes visible through the cracks. The scene ends moments before the ice breaks. Strong realistic tension. Photorealistic winter environment. Realistic ice physics. Documentary emergency preparedness style. No other people. No human silhouettes. No rescuers. No text. No camera cuts. No scene changes.