Starting to cry.... (From seeing an advert on TV)

I don't know what was suddenly up with me this morning. One minute I was enjoying Holly & Phil, the next this advert came on the telly about a website that lets you discover people and when Holly and Phil came back on I started to well up and cry. I don't know how I did it, or whether the advert DID cause it, but it strikes me I must've been thinking of something I shouldn't of been after seeing that advert because a couple a minutes after I was back to my happy self!