Depends on where you're walking and who you are with, and of course dose but that can be hard to control. In the right setting, it can be a great idea.
I would argue that such an effect is seen more at high doses and rarely at that. If your setting is a nice woodsie stroll then you can probably safely lay on the ground and watch the leaves until the moment passes. What's interesting is you'll suddenly realize your ability to move and have striking appreciation and respect for that, and that can stay with you forever. You'll also have just spent 20 minutes with the bugs and watching the trees and have strong feelings about all of that. All sorts of thoughts and perspectives you've built up over decades of life shattered. It's a great idea to see where the experience leads you.
That said, if you are dosing high enough that you expect wild effects in general, you probably shouldn't be in a setting where temporary paralysis is going to be an issue. Yeah it would be an issue to have to lay down on a sidewalk in a populated area, but so would heavy visuals and associated strange thought processes and perspectives in that setting. You don't want to talk to a stranger on high doses, and definitely not the police or an EMT.
edit: At doses that could cause paralysis, there will likely be debilitating sensory perception and cognitive processes in general, like synesthesia and your vision turning into a recursive zoom tunnel of over saturated hues, not understanding or abiding by some social constructs and speaking in metaphors that make a lot of sense to you and no one else.