put fall detection prompt as default

app.py

@@ -239,7 +239,7 @@ def main():
 
         interval   = gr.Slider(100, 20000, step=100, value=3000, label='Interval (ms)')
         sys_p      = gr.Textbox(lines=2, value="Focus on key dramatic action…", label='System Prompt')
-        usr_p      = gr.Textbox(lines=1, value="What is happening in this image?", label='User Prompt')
+        usr_p      = gr.Textbox(lines=1, value="Analyze the image and determine if there is any person lying on the floor. Respond with exactly YES or NO.", label='User Prompt')
         reset_clip = gr.Checkbox(value=False, label="Reset CLIP handler each frame")
         cam        = gr.Image(sources=['webcam'], streaming=True, label='Webcam Feed')
         cap        = gr.Textbox(interactive=False, label='Caption')