That would be hard to answer @Hamsti, seeing as I don't find my own comments funny. But I guess if I wasn't me, I'd start laughing somewhere around the second full stop.
Yeah, my husbund held that thing against my back and my whole body and head shaked...and my panic followed soon. Oh I hate that fear of everything, its quite as crippling as tinnitus itself.
I quit using an electric toothbrush because of the anxiety it was giving me (wasn't suffering spikes).
My advice, if you want to keep the gift, is to use it for short periods, and increase those periods over time. And If you notice a significant spike at any point, then just sell it.
However I would keep it at the ready, just in case of intruders.