"If you get trapped on thin ice, lie down on your stomach and crawl/wiggle your way back to shore from the direction you came from. Chances are, if the ìce held you when you were standing up, it will continue to hold you with your weight dispersed over more surface area."

easy-peasy
Instead, raise your arms and try to look as big as possible without breaking eye contact.
If they still attack you, go for the throat.
Thanks Geoff
Did someone learn that the hard way?