I was trying to undo and redo dragging a key pressed block into a list block, but then Snap! created this monstrosity:
It didn't persist with saving, sadly.
BONUS BUG! While trying to replicate this glitch (which I failed to do), I managed to somehow make a block which permanently has a shadow and makes inputs very long, remove the list input from a block and create a cyan halo that's waaay larger than the block it's being dragged into.
(excuse the lazily removed background, I just didn't want to really hurt the eyes of dark mode users)
