Sometimes it's hard to understand what someone said if you weren't expecting to hear that. If I'd heard "on your left" I'd assume you want me to move to my left assuming I understood what you said but given that it's being said so fast and when I wasn't expecting it it's more likely I won't understand a word of what you said
thankfully, it doesn't get that hot in my country....yeah, maybe a few days, but most days will not be bloody hot. So I prefer summer over autumn and winter, because in my country that means having to plow through deep mud and either not ride or ride in loads of rain, rain and more rain...