Friendly Ghost
I worked at a diner where the kids of the original owner, who died 3 years before this incident, owned and ran the place. It was slammed busy and I was the only cashier / host on staff so I was sprinting around the place and asking the customers for patience.
As I was running from the back to the front end to seat the next guest I saw someone from the corner of my eye stand up from the breakfast bar area and run my direction to help out. I thought it was the current owner since he was wearing the baking uniform he normally wears on cupcake making day.
I turn and go to thank him for jumping in but the dude disappears as soon as I look at him. I told a waitress and they asked if he jumped up from the end seat and I said yes. They told me that’s where the original owner used to sit and he was jumping in to help me out like he would have if he was alive.
Apparently all of them have seen the ghost around the store helping and they all love and miss him. Story credit: Reddit / FhaeShine