The Brave and the Bold (1) - S1-E12
Continuity mistake: When the car crashes into the café Flash is at, you see it hit the counter and fall back down, and nothing is on the hood. When Flash asks the guy if he's okay, there's a burger on a pretty flat part of the hood. In the next shot, it's gone, and the hood is completely crumpled up.
The Brave and the Bold (1) - S1-E12
Other mistake: Flash brags about having beaten Gorilla Grodd to two girls at the beginning of the episode, but then later is surprised by talking gorillas and seemingly meets Grodd for the first time.
Suggested correction: Flash never talks about Grodd. He's telling a story about Solomon Grundy.