Colin couldn't help the way his eyes lit up with excitement when she blushed and thanked him. She'd thanked him! Asking, in his excitement a little bit quickly, he said, "I was curious, do you have much experience on the Underground? I thought it would be fun to take it toward the park so that we can enjoy our picnic instead of walking all the way through the city? I've been on the trains quite a few times, gotten pretty good at it, but if it makes you uncomfortable I understand," he waited for her reaction hoping she wouldn't think it was a terrible idea. To be honest, he found the trains quite fun.