The physical aspect of the question was specifically what he was asking for. He's glad at least, that Joker can stand up. Now they just had to give walking a try. He holds his hand out, even after Joker's standing on his own, because he isn't sure what made the human collapse the first time or if it might happen again. He's pretty clearly worried and unsure, but there's another feeling there too. It's something close to confidence, or maybe even pride. That Joker's agreed to let him help, even though he's worried, that gives him some small amount of hope that things will get better. It's probably one of the bigger differences between them, Psi still believed things could get better. There's a future where he isn't so lucky, strung up and forced into an eternity of motionless servitude, but he's yet to have that last bit of joy stamped out of him, so for now he lets himself believe that change is possible.

It doesn't take them too long to get to the Psionic's trailer. Hopefully they both make it in one piece. Psi let's Joker get settled inside at the table while he debates on how to proceed.

"Do you want... A drink?"