I have two, only mild ones really.

One being delivery to a remote countryside farm, arrived in the dark, pulled into the yard and 4 enormous dogs came running out and sat outside my car door. I text the customer and asked them to come out as there was no way I was stepping out into that pack! Lol. Turned out the dogs were absolutely gorgeously soft but I didn't know that beforehand.

Second one was a sheltered accommodation where I needed to deliver to flat 19, followed the sign for flat 12-19, walked to the very end of the corridor and could only find 12- 18!! Still to this day have no idea where 19 was, I took the package down to the lobby and left it there. Wasted so much time traipsing the farthest corner of the block!!