Ghosts & Goblins

Frog character - Shoot (you have to duck down) a tombstone 15 times. An angel will appear and fire a bolt at you, changing you into a frog. You will automatically change back after a few seconds.

Unlimited (?) time - Using the above trick, if you fire your 15th bolt with time about to run out (0:02), you’ll immediately turn into a frog (instead of dying), and the time counter will wrap to “negative” time.