He robbed me

I opened Lone Oak at 6:00 saturday morning like i do every saturday. The morning was slow with a few regular customers coming and going. At about 7:15 a black male about 25 years old came in the store. He asked to buy a cup of water and i replied yes it will be 25 cents. As he walked toward the fountain drinks i told him we didnt have a water spout over there. I was nice and said i could get him some water from the kitchen. The guy said no thanks he needed hot water. So he filled a 16 ounce cup with the water out of the spicet on the side of the coffee pot. (The water is about 100 degrees) I didn't put much thought into why he needed hot water so i was like ok. So then the guy walked up to the counter and i checked him out. When i opened the register to put his change in the guy through the hot water at my chest and grabed the money and ran out the door. I screamed for chris to come help me (chris is deli guy) He ran out the store only being able to see the car pulling out the parking lot. The cops came and so did the parimedics. I had to go to the ER to be treated for 2nd degree burns. After the hospital visit i had to go to the sheriffs office to record a statement and to describe in detail to the sketch artist what the man looked like. (this is important because the tape in the cameras was not recording at the time) so it was about 2:00 when i finaly got to go home and take pain medacine and go to sleep. That was my eventful saturday! so tell me what you would have done in that situation!