The Flash Season 2: 10 Questions We're Asking After Family Of Rogues

8. Why Didn't Barry Just Use His Speed On Lewis Snart?

After getting their hands on the diamonds, Lewis and Leonard Snart prepare to make their getaway, only to find the Flash standing in the way. It's at this point that Lewis instructs his son to shoot him with the cold gun, holding the threat of the bomb in Lisa's head to force him into it. Cold is hesitating, Barry is trying to stall them, and then finally he has confirmation that the bomb is out of Lisa's head, thus Lewis doesn't have any hold over his son. In a rather brutal conclusion, Leonard Snart turns the cold gun on his own father (followed up by the rather corny "he broke my sister's heart..." line that somehow works when Wentworth Miller delivers it). However, the question I'm asking here is why Barry didn't simply use his speed to disarm the elder Snart? It could've been done in, well, a flash, and saved Lewis from having to be killed off, because it'd be fun to see more of Michael Ironside in the role.