It's a world where the fact that there's an area where animals care for themselves and the weather is automatic is super spooky. I would imagine if a pony saw an object floating without a magical aura they'd freak out as well. So I can see there being some wiggle room for trying to hide how the magic was done being a fun show to watch.
Less 'how did that unicorn make those five ponies disappear?' and more 'how did that unicorn make those five ponies disappear with only a second of magic channeled through the horn?'