Nobody likes attention seekers. Doing anything for the sake of making other people look at you is a phase most of us grow out of while we're still in high school. Not everyone is so lucky, though. Some people get the attention-seeking bug so badly that it plagues them for the rest of their lives, and they're constantly compelled to go out and pull stunts like this in front of shoppers who are just minding their own business.
We have no idea whether these plungers belong to the store, or whether this 'zany' couple brought them along just for the purpose of taking these pictures. What we do know is that if we got whacked by one of those plungers when this woman turned around a corner, we'd be extremely angry about it. Put the plungers down, get on with your shop, and then leave the store quietly like reasonable human beings.