Eyes tearing when talking about ghost but im not crying?

its so weird! when ever me and my friend talk about ghost expirenece or ghost our eyes tear up but were not crying.. its mad weird.. does any1 no what this is? like one time i was talking about ghost wit my other friend and she thought i was crying.. and when i was with my friend (the 1 who eyes tear to) we heard a ghost laugh so r eyes were tearing but we werent crying then later on that day we talked about the laugh and our eyes teared.. what is this? were not crying! i no when im crying lol i never cry about ghost soo does any1 no what this is? thank youu