Sam laughed. "I know you've been in my apartment, Oliver. I didn't think you went into my broom cupboard," he replied with a shrug. Even if he hadn't, Sam was sure that Oliver had seen a normal muggle broom before. He probably thought it was rather wimpy next to his.
He was reassured by Oliver's words. Even if Oliver hadn't ridden with someone before, he had to know what he was doing. "So...I just mount then?" he asked as he walked up beside Oliver.