Sakura was so happy when Gaara increased his chakra enough to get past the first physical block that she actually hugged him before she could stop and think about what she was doing.
When Gaara very obviously did not hug her back she backed off quickly.
"Sorry. Sorry." She said, embarrassed by her outburst. She wasn't that close with Gaara after all; she had no right to touch him so casually.
Gaara shook his head and turned away to cover his blush.