On Chapter 9, a Wyvern Rider attacked Cordelia. She had a Javelin equipped, so she was only doubling with 6 damage, but the first attack managed to pull off a 1% critical so she did 24 total.
Once it was my turn again, I switched to a Steel Lance to finish the Wyvern Rider off in one attack... And she got a second 1% critical on the same enemy. Completely pointless, but it was still awesome.