Well, as long as no one had their face right over the drain----- However... if you do happen to have someone in that position, you MUST get it on video and SHARE!
You could try a flexible snake... use tape on any parts that are sharp or could snag (both on the push or the pull). You might even get lucky by using a small diameter, vinyl hose as a snake. Vinyl, as opposed to rubber, tends to be a little stiffer and might make it easier to push through a bend.
Also, try pushing the vinyl hose in from the outside - but duct tape it to your hose sprayer. Sort of a make-shift "power snake".
You could also try compressed air (again, from the outside/thru-hull). Use duct tape to make a good seal. Start with about 5-10 psi and see what happens. At that pressure, you absolutely won't do any damage.