Jesus Curses the Fig Tree

I was reading these verses this morning and i scratched my head.

Mark:12-14, 20-21: The next morning as they were leaving Bethany, Jesus was hungry. He noticed a fig tree in full leaf a little way off, so he went over to see if he could find any figs. But there were only leaves because it was too early in the season for fruit. Then Jesus said to the tree, “May no one ever eat your fruit again!” And the disciples heard him say it..... In the morning, as they went along, they saw the fig tree withered from the roots. Peter remembered and said to Jesus, "Rabbi, look! The fig tree you cursed has withered!"

Maybe this would have all made sense to the disciples back in the day, but I'm pretty sure if I were there with them, we'd have all been quietly asking each other, "You have any clue as to what that means? Nope? Ok, me neither."

Maybe Jesus had low blood sugar and was a little grumpy? I can relate.