Stand off between Police and protesters in Hong Kong

The video covers a protest in Hong Kong where police use tear gas and rubber bullets against protesters. Protesters respond with makeshift barricades and defensive tactics like using fabric softener and umbrellas. A standoff ensues, with police reinforcements arriving. The protest is part of a larger anti-Beijing sentiment, and further escalation is expected.

How did the protesters attempt to make the ground slippery?

What was the atmosphere like during the standoff between the police and protesters?