And you know who you are
So this guy's aunt leaves him a cabana on the beach, with one stipulation: he has to supply each of the porpoises in her bathtub with a live gull a day. If he does that, they will live forever. After about a year, upon his return from the morning trapping session, he finds an old lion sleeping on the doorstep. After observing for a spell, he decides that he can probably step over it if he's careful. He reaches across and opens the door, then steps into the house.
He is immediately seized by the FBI and charged with transporting gulls across a staid lion for immortal porpoises.