I know Flint said "An invisible man tackled me in the alley." Now Claude was MIA and presumed Dead at this point and according to his Company File, Claude is the only one they know of with invisibility, so if Claude did tackle Flint, it certainly wasn't to help the Company as he's shown time and again and it's documented in his profile that Claude has rejected them. It's also possible someone with telekinesis got Flint and it felt like someone tackling him. Flint isn't the sharpest tool in the shed.