Revealing mistake: When the farmer is going to shoot the sign the bank put up, you can very well see the mark where the hole is going to appear.
Revealing mistake: When CW Moss throws the grenade beneath the armored police vehicle, the resulting explosion does not appear where the grenade landed.
Answer: Bonnie and Clyde were bank robbers, remember - it's quite reasonable that Bonnie would buy herself some clothes with the proceeds.
Kimberly Klaus