Person B texts Person A saying "Today, you'll slip on a banana peel." 

Person A replies "lmao me" later that day Person A slips on a banana peel. Person B texts them back after that fall. "I told you." Person A is very confused. 

Person A texts Person B "Today, you'll fall when you're getting a smoothie at the mall." While they were at the mall. Person B gets a smoothie and falls. Person A laughs and says "Karma"