Spot the mistake(s)

Three mistakes - can you spot them? I do hope so.
Spot the mistake(s)

So a competitor (good people) recently posted this photo on their company facebook feed. It commended the young men who were helping for their "eye for detail". Now, "each to their own", as they say, but at The Bouncy Castle Company, this situation would be a big no-no for at least three mistakes. Can you spot them? I shall add this to the company manual. Maybe, make a silhouette of the situation with a big red cross next to it.