I ran into this man who was my CPR instructor like 5yrs ago

Really surprised he even recognized me...? He must have had dozens of classes. I actually recognized him as well, long before he even spoke to me. I recall talking to him as he was packing up his stuff at the end of that CPR class and he was telling me about all of his adventures and how he's an adrenaline junkie! I asked him how far was he willing to go for adrenaline and he stopped packing his things and locked eyes with me. I saw something dark in him and I changed the subject lmao