I feel so bad for Zach. Notice that while we have had to endure Flo's whines with Zach in the previous episodes; it's this episode, after Flo's expressed interest in Drew and started flirting with him, then we see a lot of Zach's gallant behaviour. You know, the carrying of the bags, and carrying her over the fence, and everything.
What makes it worse is that I'm sure he's been so nice to Flo during the entire race. Never ever raised his voice at her at all. Kinda makes me want to slap Flo, don't you agree?