Cassandra Sanchez was the woman clinging on for dear life and -- she says -- yelling at Sean Kingston to slow down before he crashed his jet ski into a Miami bridge. Sean ended up in critical condition, but Cassandra escaped just fine. And she told TMZ that she won't be hiring a lawyer or pressing any charges because Sean is a longtime friend of hers and she knows he didn't mean for either of them to get hurt. Sean is expected to remain in the hospital for the next several weeks and Cassandra says she plans to visit him….probably right after that check his people have promised her clears the bank because you know good and well that girl is getting paid….