Scrubby zoom just stopped working.

I have Illustrator CC 2015.3 and I was using the scrubby zoom feature as normal and then I accidentally hit some mystery keys and now the zoom feature doesn't work.

I opened preferences and animated zoom is still checked, but won't work.

Halp, can someone please tell me what's going on?

I've noticed this happens sometimes when I open back saved files from older versions of illustrator, but it happened this time in a new document I made.