The Physics of GriGri | When does No-Hands Belay Fail?
24:10
When Assistance Fails!? The Physics And Experiments of Belay Devices
30:36
Complete Guide into Belay Devices - Differences and Efficient Usage | Ep.6
16:21
Why NEOX is not a GriGri - Long Term Review
17:06
Climbing Sling Myths
16:31
Why Snatch Blocks are AWESOME (How Pulleys Work) - Smarter Every Day 228
19:06
Petzl said to NEVER do this
20:00
Falling physics that Every Climber Needs to know
13:50