Jim Cramer appears on his CNBC show "Mad Money" to answer rapid-fire questions from viewers in a segment called the lightning round. During this session, he addresses several specific equities including Boston Scientific, Nokia, Chewy, Applied Optoelectronics, Ford, Eli Lilly, and Caterpillar, providing buy or hold recommendations for each. He advises holding Boston Scientific despite its recent decline, while suggesting a buy for Nokia due to its exposure in the data center, cloud sectors, and defense contracts. Conversely, he cautions against buying Chewy until geopolitical conflicts resolve, warns that Applied Optoelectronics is trading too high after parabolic gains, and recommends taking a pass on Ford due to warranty issues, ongoing war impacts, and interest rate environments. For Eli Lilly, Cramer expresses strong bullish sentiment, stating he is ready to sell the stock he holds because it represents a bull market scenario. The most detailed discussion concerns Caterpillar, where Cramer explicitly labels it as a buy. He argues that investors often overlook Caterpillar's significant exposure to oil and gas production, noting that energy output has increased substantially recently. Additionally, he highlights the company's role in construction and infrastructure projects and points out its engine technology, which aligns with the electrification needs of hyperscale data centers aiming to reach gigawatt power consumption levels.