"Why would you want to scare someone?" asks Juro, while the rest of the Magelets are working out a new way to get over that wall and to the beach. Stairs won't work for the Leever, and a slope both ways looks way too slippery... but maybe not for the Leever and it could push them up it?

As for petting, petting it on the rubbery sides and staying away from the top seems the best option.