That's a tricky situation. Try sticking the mouse in front of the hole again and see if she will bite onto it. If she does, see if you can't get a hold on her and pull her out.

Good Luck
Mike
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1.1 Cal. Kings
1.0 Ball Python
0.0.1 Jungle Carpet Python
0.0.2 African House Snakes
0.0.1 Oketee Corn Snake
0.1 Salmon Boa Constrictor
0.0.1 Marbled Salamander
0.0.1 Japanese Fire-Bellied Newt
0.2 Labs