Godzilla vs. Megalon (1973)

Nuclear testing at sea causes fissures to appear inland. From the cracks, a three-million-year-old civilisation sends Megalon (left of picture), who sets about destroying indiscriminately via the use of stock footage.
The thirteenth movie gets a lot of hate, but not from me. It's utterly terrible, I admit, but it's also strangely fantastic, balancing perfectly on the theoretical line that exists between the two subjective states.

It was originally a tokusatsu robot story that had a friendly-eyed Godzilla added to it, so the robot (imagine Ultraman with an inane grin after sharting himself) gets more screen time than Godzilla. The latter arrives late to the party but brings the smack down. The tag team wrestle that ends the 70s train wreck is hilarity of the highest and lowest calibre.

3 hand signals out of 5