Chubby has the soda jerk remove the cap after Jean makes a big deal about it, but when the bottles fly up in the air, the caps are on both of them.
Joe's pants are already torn before Chubby tears them. He is already holding them up while he is running.
When Joe and Chubby collide, their soda bottles fall right to the ground, but, in the next few shots, the bottles fly up in the air, and shatter on the ground.