"I'll make sure you get there safely," Erik says without a single tone brooking argument. If Charles' legs are giving out on him, he'll need all the help he can get and Erik's singular focus is on helping him (not even a flicker of thought goes to putting up his shields, given that he has no idea how long it will take his powers to come back). "Come on," he encourages, slouching just enough for Charles to be able to put an arm around his shoulders for the bolstering help.