For example, going at a slow pace when clicking the right zoom arrow, a user can switch from 50% to 55% to 60% to 65% to 70% to 75% to 80%, and so-forth. The user properly progresses through (let's say) 10 increments, eventually arriving at 100%.    However, if the user clicks the arrow the same 10 times, but at a faster pace, many of the increments are skipped over.  In one test, 10 rapid clicks brought me from 50% up to 250%.