The guys ‘kidnap’ Leonard to take him on a bachelor weekend. Sheldon is lured on this trip because the van belonged to Richard Feynman. He adores Feynman as we know. They are also going to stay in the house he once owned in Mexico.
On the way they get a flat tire and somehow none of them, including Howard the Engineer can change it. They manage to set the van alight instead.
The girls have a mini bachelorette party, with them convincing Penny and Amy to tell their families about their relationship statuses.
The guys scenes might be worth seeing. There may be a few laughs in this.