While the Timmy to the Rescue film was kinda lame. Timmy's clever trick to fool Martin's army was pretty impressive.
ANY scene where Mrs. Brisby, who's primary state of mind throughout 90% of the film is terrified (which makes sense, really, given that she's a mouse), pulls herself together. She isn't a Mama Bear in the sense of 'hurt my kids and I will beat you down,' but the lengths she can and will go through for them is astonishing. In particular there's:
Parlaying with the Great Owl in his own hollow when she knows full well "Owlseatmice!" Sure, being Jonathan's wife meant she had the automatic respect of even certain predators, but she didn't know that at the time - and neither did the Owl, at first.
The scene is an awesome moment for the production team — the fantastic artwork, the terrifying atmosphere, the awesome animation for the Great Owl — it's one of the best scenes in the movie, and the Owl himself is one of the greatest animated dragons in film.
Rappelling down from the cage in the Fitzgerald's house using a piece of string (also, the act which got her stuck there in the first place.)
Climbing up a moving tractor to try and figure out how to stop it before it reaches their home and destroys it with her son still inside.
Venturing into the Rosebush, with all its Disney Acid Sequence goodness, including a leering face made of lights and a giant sentry rat with a huge freaking halberd! And then, after being chased away by said halberd-wielding rat, going back in to do what she came to do.
The best part is, you KNEW it was only a matter of time, before they crossed swords, and the wait is definitely worth it. Everything from the dialogue, music, the use of dramatic camera angles, and the lighting effects combine to make what is still one of the most epic moments in animated film history.
Jeremy spends most of the first film irritating Mrs Brisby by being an incompetent Butt Monkey. However, he is the one character in the film to directly attack Dragon to protect her. Later on, as Mrs. Brisby cries over losing Timmy's medicine, Jeremy loses his train of thought and rambles on about their effort, before taking a small bag from under his wing. He saved her from the cat and preserved what was seemingly a useless piece of paper from the scuffle, and what's more acts like it was nothing at all.
Jeremy: Oh by the way, you dropped this back there...