This was from an afternoon nap an hour ago, but close enough.
So, for some undefined reason I was living in/staying at this hotel, near the top floor (I think like floor 9 or something). For most of the dream, I kept hearing loud thumps up on the roof, and I vaguely remember going up there a few times to try and find out what it was (I didn't at first). Eventually, the upper floors are being destroyed, so I panic and flee down to the first floor, leaving everything I own behind.
Once I'm down, I calm down a bit, figure that whatever was destroying the upper floors wouldn't destroy its way all the way down to ground level, and tell everyone in the lobby that the upper floors are being destroyed. They told me to go find out what it was, but I decided against it. Turns out it was a T-REX, which proceeds to burst in through the first floor via center courtyard garden. I try to run and hide somewhere in the building, but it hunts me down and eats me without much effort.
Promptly after I'm dead, this cheery musical number sung by some unseen chorus starts singing about how various animals have different ways to survive in the world, with each trait (changing color patterns, able to fit through tiny cracks, etc) having its own little 3-4 line verse and style of music. The song eventually transitioned into the ingredient contents of hot dogs and pancakes for some reason, I guess to emphasize the fact that I got eaten and suck at hiding.
Then I woke up with a headache.