A bit of role-playing:
Grunther wakes groggily in his new, massive body. He flounders around, breaking nearby furniture with his strength, and says in a strange, deep voice, "What happened? Not feeling so good."
<I assume the other PCs explain the bad news and good.>
Grunther cries for a while and says, "What do I do? People will hate me. I look like something horrible."
<After reassurance, he decides to continue adventuring.> "What else can I do? No one will want me here anyway. No one will even believe I'm still me."
<He does appreciate the new equipment and his new strength.>
Then the party continues.