Icelandic Geysir is hot spring bursting boiling steam and water. Hot Geysir spring intermittently sends up fountainlike jets of boiling water and steam into the air.
Bursting Geysir block could be used like a Venus Guytrap etc with Parkour worlds. Geysir block could be wrenchable with OFF, 5sec burst delay or 10sec burst delays. Hot Geysir springs would be giving some new challenge for GT parkour pros..