Rachel experiences her very first blow-to-burst experiment, and then blows a double-stuffed pair. She really appreciates the check valve for the latter, as it takes twice the pressure throughout the process from startup to bursting.

Rachel experiences her very first blow-to-burst experiment, and then blows a double-stuffed pair. She really appreciates the check valve for the latter, as it takes twice the pressure throughout the process from startup to bursting.