Big as he is he curls up like a sensitive plant when touched by adversity.
Licks my nose first an' then curls up his tongue an' licks off his own.
When she curls up in front of the fire she is round like a ball.
If it curls up and smells like burning wool, it is probably silk.
It may be of value if split and dried in the sun so that it curls up into a round straw.