your at a beach wedding. Your sisters to be precise. you see a pretty girls head like out of the water. she has a beautiful smile

later your swimming with friends.(still at the wedding) and a fin lightly caresses your arm

she's swimming around you in circles

"do you guys see this?!" you asking your friends. panick in you voice

"no? see what?" they reply thinking you've had too much to drink

they don't see her...only you do