"Mad Money" host Jim Cramer rings the lightning round bell, which means he's giving his answers to callers' stock questions at rapid speed.

"Mad Money" host Jim Cramer rings the lightning round bell, which means he's giving his answers to callers' stock questions at rapid speed.

Jim Cramer likes Nextpower and calls its CEO a 'miracle worker.' Chewy is 'too hard to own' and Butterfly Network is a promising company.