Tick-SOS ticket / ticket

We will visit crowded public place for a favorite concert or a fond team etc. And we must be ticket holders. As we all know people have different level of physical ability.
Also there are so many congestion accidents happen in crowed public place. People can hardly noticed all confusion in a crowded noisy place. Your sudden feeling of illness can hardly noticed by those around you in such a crowded noisy place. But you starve for help! Push the air bag in the SOS ticket and the special materials can occur and produce excitant gases to get those around attention and help in an emergency.