When Dally started to make a move on Cherry who stopped him?

Cherry Valance stopped Dally when he started to make a move on her at the drive-in movie. She firmly asserted herself, making it clear that she wasn't interested in his advances and wouldn’t tolerate his behavior. This interaction highlighted Cherry's strength and independence, as well as the social divide between the Greasers and Socs. Dally's shock at her rejection also underscored the differences in how the two groups approached relationships.